Frequently Asked Questions

The best way to ensure all your data and settings are brought over is through Backup and Restore.

Follow these steps:

In the old device:

1.        Create a backup through Menu > Backup (Menu > File > Backup in eM Client 7 and older)
2.        Deactivate your license if you are no longer going to use eM Client on this device in Menu > Help > License (not needed for one-seat licenses, but useful for making sure no licensing problems happen)
3.        Find the .ZIP backup file and move it to your new device
   (by default in ..\Documents\eM Client)

In your new device:

1.        Install eM Client (download it here)
2.        Skip initial setup
3.        Restore from your backup through Menu > File > Restore
4.        Activate your license in Menu > Help > License

If you put the backup file in the new device in the same folder structure as the default (..\Documents\eM Client) the restore will find it right away. Otherwise, you'll need to specify the path where the backup file can be found (in Menu > Settings > General > Backup).

You can also find these steps in our blog here: Transfer Your eM Client Data to a New Device

This feature is a view option which can show your messages and replies to them in threads that enable you to easily read through the previous conversation on the topic in the given message thread.

Conversations are always created from messages in the given Account folders. The messages are not combined across multiple accounts.  

IMPORTANT: Deleting the conversation from message list when Conversation view is enabled in all views deletes the whole conversation.

You can change your Conversations setting in Menu > View > Conversations section to these options:

1. Conversations in All Views 

2. Conversation in Message detail only

3. Conversations disabled

 

  Read more in our blog: Conversations

After you download the installer from our website, run the downloaded ‘setup’ file and proceed with the installation steps.

During the installation, you can, for example, choose to make the application launch on the system startup or set it as the default mail app on your device.

eM Client can import your data directly from Microsoft Outlook, Thunderbird, other popular clients, previous eM Client database or relevant data files.

When you first run the application, an automatic import wizard will lead you through the process if it detects that you have other email client(s) installed.

Besides this, the import options can be accessed at any time in Menu > File > Import.
This option allows you to import your emails from .eml files, contacts from .vcf or .csv files, calendar and tasks from .ics files or even eM Client settings from .xml files.

Read more in our blog: Import Data from other email clients to eM Client and in the Documentation: Getting Started.

Free license, as the name implies, can be registered at no cost. This license is meant for personal use and some of its features are limited.
Personal and Business licenses are paid licenses with no feature limits. Find the list of all features on our Pricing page or the License model page. You can decide to buy the license as a subscription or for a one-time fee.

While the Free license allows you to set up a maximum of two accounts in eM Client, it is possible to add an unlimited number of accounts with the Personal or Business license.

Free license can be activated on one device at a time.

The paid licenses also enable you to use eM Client for commercial purposes. Commercial use is any activity that helps you make a profit – the Free license therefore cannot be used in company settings or on personal computers for any kind of work or business correspondence.
The Personal license is intended for home use and for freelancers or sole proprietors.
Personal license cannot be used in companies, schools, non-profit organizations, governments, or any other institutions, even if you are just an employee. In these cases, a Business license is required.

Business and Personal license users also gain access to the dedicated VIP support system. The support options are fully described in the Support overview.

If you’re not sure about the type of license that you need, please get in touch with our sales department at [email protected]

After you finish installing eM Client you will be automatically asked to set up your first account. You can use the Automatic setup or open the other tabs to explore manual setup options.

To set up additional email accounts go to Menu > Accounts section and create new accounts using the '+ Add account' button.

To explore the setup options in more detail please read the Create New Account page from our online Documentation or check out specific account types in the Compatibility section on our website.

The backup options are accessible in Menu > Settings > General > Backup.
You can choose the folder where the backups will be saved and once you check the ‘Enable Backup’ option, you can also select how often you’d like the backup to occur and how many backups you want to keep (you can store up to five different backups at a time).

To change the time of the backup on Windows:

1.        Open up the Windows 'Task Scheduler' tool
2.        Click on the Task Scheduler Library
3.        You will see eM Client Database Backup in the middle window amongst the other tasks – double-click it to open the properties
4.        Go to the ‘Triggers’ tab
5.        Now you can edit the time and day when the backup takes place.

Mac does not have a default system scheduler, so the time needs to be changed either using a 3rd party app that has this functionality, or you can change it in the file ~/Library/LaunchAgents/com.emclient.mail.backup.plist

If you want to change the backup time to the current time, you can do that from inside eM Client:

• In eM Client > Settings > General > Backup uncheck Enable periodic backup
• Click 'Apply'
• Enable periodic backup again
• Hold the Alt (or Option) key and click 'Save & Close' or 'Apply' - this should change the backup time to the exact time you changed the setting.
• Restart launch agent - open terminal and run these two commands: 
• launchctl unload ~/Library/LaunchAgents/com.emclient.mail.backup.plist
• launchctl load ~/Library/LaunchAgents/com.emclient.mail.backup.plist

The default time for the backup on macOS is 10:00 AM.

Right-click anywhere in the toolbar and select ‘Customize’. In the window that appears, remove and add items or change their order by using the ‘Add’, ‘Remove’ and Arrow buttons.

In versions newer than eM Client 7.1, you can also customize the Mail toolbars centrally in Menu > Settings > Appearance > Toolbars.

Read more in our blog: Customizing user interface in eM Client and in the Documentation: Toolbars 

1. If you’re getting an error message, please enclose a screenshot of the error.

2. Send us the whole content of the ‘Log’ tab.
If an error appears, you can access the log by clicking on the third tab in the same window as the Error. If no error appears, go to Menu > Operations, click the 'Copy log' button and paste the log (Ctrl+V) in a message to us.

3. Send us the full number of the version that you’re using (you can find this information in Menu > Help > About).

4. Try to remember what changes you’ve made in eM Client or in your system before the problem started and describe them to us.

Submit the report via one of our Support options or send it to [email protected] (if you're still using the Trial version) and we’ll do our best to resolve the issue as soon as possible.

Don’t worry, a lost activation key is no problem.

Simply enter the email address used for the license registration here and we will send you your activation key immediately.

If you have problems receiving the key, please make sure that you entered your address correctly and also check your Spam folder.

If you’re worried that you cannot retrieve your key because eM Client is in offline mode, please be aware that most email providers in this day have a webmail option, where you can login and get your messages through your internet browser (for example Gmail addresses can be checked in your browser at mail.google.com, Hotmail, MSN, Outlook and other Microsoft accounts can be checked at outlook.live.com, etc.).

Basic eM Client licenses are meant to be used on one computer only, so if you have one eM Client license and are using eM Client on two or more computers, you will be asked to re-activate your eM Client license each time you switch between the computers.

However, we offer significant discounts on multi-license orders so you can purchase all the licenses you may potentially need in bulk. If you have any questions regarding the purchase or would like to talk about the pricing individually, please contact our sales department at [email protected].

If you have several email addresses linked to eM Client, the first one that you have added will be automatically set as the default. The default account will be selected as the sender when you compose messages in a neutral place, such as the Favorites or Local Folders. You can change which email account you’re sending messages from just by clicking on your email address in the New Message window.

If you want to change your default account so you don’t have to perform this step every time, go to Menu > Accounts, select the preferred account from the list on the left side and then click the ‘Set as default’ button. The account marked by a star is the one set as default.

Read more in the Documentation: Accounts

The automatic setup in eM Client uses the autodiscover settings on your email server. That helps the application detect the correct account settings and lets you access your data almost immediately. The most common setup is IMAP, but it also depends on the mail server you’re using with eM Client.

Read more in the Documentation: Create New Account

You can set up your account manually in eM Client in a few simple steps.

1.        Go to Menu > Accounts and click the button ‘+Add Account’.
2.        Skip the Automatic Setup option, click on Mail and select ‘Other’ from the menu that appears.
3.        Click ‘Next’ to proceed with the manual configuration of your account and then simply follow the instructions.

Note: If you want to specify the port during the initial setup, simply add a colon and the port number directly after the server URL. Example: mail.domain.com:993

Read more in the Documentation: Create New Account

Favorite Folders are virtual folders that display all messages from a certain folder type (such as Inbox, Outbox, Sent, Unread, Flagged messages, Search Folders or folders based on Tags) from all of your email accounts at once. They can be found in the left pane in the Mail tab, above the folders for your individual accounts.

This feature allows you to check all emails without having to go through each separate account individually. 

You can also pin any of the other folders from your accounts into this section, so the folders you use most often are easily accessible.

These folders can be enabled/disabled in Menu > Settings > General > General via the 'Show Favorite folders' option.

Read more on our blog: Inboxes and other special folders in eM Client or in our Documentation: About Favorite Folders

Go to Menu > Rules and a window with various options will appear, from where you can create and edit the rules. Click '+New rule' and follow the Rule Wizard, it will guide you through the process.

You can also create rules quickly via right-click on a specific message and using the option to 'Create Rule from Message' to set a rule either based on the sender or subject.

Read more in the Documentation: Rules

You can edit shortcuts to fit your needs by going to ... > Settings > General > Shortcuts.
Click on any shortcut that you want to change. Then, press the combination of keys you would like to use instead and the new information will appear next to the option name.

Find the full list of all shortcuts on our website: eM Client Shortcuts List

You cannot create new shortcuts in the Settings but the Quick Actions feature allows you to create your own shortcuts and combine numerous actions into one. Shortcuts for new actions cannot be created at this time.

Read more in our documentation: Quick Actions

Even if you use features like rules and customizable folders to sort your mail, it can still be difficult to find a specific email. While you can manually go through your folders, there’s a much easier way to quickly find what you're looking for - all you have to do is use the search feature.

The search bar is located at the top center. You can use this bar to search for keywords in the email subject, body, sender’s or recipient’s addresses, notes and attachments. Type in the keyword, hit ‘Enter’ and a list of emails with that phrase will pop up.

Advanced search

For a slightly more advanced search, you can type a “?” in the search bar and a drop-down menu will appear. This can help you narrow down your search by specifying things like the location of the keywords, if the email has an attachment, if it was sent before or after a certain date and so on.
You can also click the downward pointing triangle at the end of the search bar to get a list of advanced options to further narrow down your search.
Select ‘Advanced Search’ for even more options.

Search Bar tips & tricks

•          If you don’t remember a certain part of your keyword, you can use the wildcard “*” to represent any character(s). For example, searching for “*ance” will turn up both “finance” and “fiancé”.
•          eM Client always searches as though there was a wildcard at the end of your keyword, so even if you don’t insert a “*” at the end, it will effectively still search for “keyword*”.
•          If you search for an email address, eM Client will give you a list of suggestions for completing the address based on who's in your contact list. Please be aware that @ isn’t treated as a separator, the whole address is therefore one text string. If you’re searching for a text inside the domain name, you need to use the wildcard: e.g. searching for ‘*emclient.com’ will turn up [email protected].
•          Please be aware that to search through the body of an email, full messages need to be downloaded. For IMAP this is not a default setting. Go to Menu > Accounts and enable downloading of messages for offline use under the IMAP tab.

Read more in our blog: Search keywords

You probably already know that you can link several accounts to eM Client. But you might also decide that, for whatever reason, you don't want a specific account linked to eM Client after all. Luckily, you can remove an account from eM Client in just a few seconds.

Go to Menu > Accounts.
In the left-hand side of the dialogue box, you'll see the list of accounts you've linked to eM Client. Select the one you want to remove and click the Remove button in the toolbar at the top.

Read more in the Documentation: Accounts

Go to menu > Accounts. On the left side of the window that appears, you’ll see a list of the accounts that you have linked with eM Client.

To change the order of these accounts, simply click on one of them. Then use the Up or Down buttons in the top toolbar to move the account in the desired direction. This changes the order of your accounts in the main Mail tab.
The location of the Local Folders and Archive cannot be changed.

IMPORTANT: Please note that changing the account order is not the same thing as setting an account as default. The default account is always the one marked by a star, not necessarily the first one on the list.

eM Client supports export to all standard file types for all your items.

You can export emails into an email message format (.eml), calendars and tasks into iCalendar files (.ics) or your contacts into VCards (.vcf).

You can also export your account settings, rules, signatures, and other settings into a .xml file and import it into another instance of eM Client.

The export feature is accessible in menu > File > Export.

Read more in the Documentation: Export

There are two types of archiving: local archiving and server-side archiving.

For local archiving, eM Client contains an Automatic Archiving feature which allows you to download all messages older than a selected number of days from the server and keep them stored on your local drive. These emails can be found in the Archive folder in the program’s left pane, below the accounts folders and Local Folders.

You can find this option under Menu > Settings > Mail > Automatic Archiving. It is necessary to set Archiving Scope under the Account Preferences section for the archiving to be performed.

Server-side archiving is available for all IMAP and Exchange accounts. The Archive folder will show up under the account's own folders and you can use the ‘Move to Archive’ button or shortcut to move messages from these accounts' folders to their specific Archive folder with one step.

This feature was originally only supported for Google accounts where the 'Move to Archive' option only removes the Inbox label, the same way it works on webmail, keeping the message in the All Mail folder.

Read more on our blog: Archive your emails easily with eM Client 

This window is a normal step of Gmail accounts set up, as can be seen in our step-by-step Gmail/G Suite setup on our website.

It's part of Google's authentication called oAuth, where instead of giving the external application (eM Client) your password, you just give access from your Google account settings.

So, log in with your Gmail account and allow access for eM Client by clicking on "Accept" on the second browser page right after you log in to the browser.

eM Client will be granted an authentication token that you can revoke at any time using your online Google accounts settings.

Read more in our blog: OAuth authentication with Gmail

Search folders are virtual folders that perform a search on selected criteria once you open the folder, allowing you to collect your items from specific folders or multiple selected folders just by using the right keyword or criteria.

Search Folders have a dedicated section in the left pane below Favorite folders. You can hide this section or show it again from menu > Settings > General > Folders.

Right-click the Search Folders section to create a new search folder. You can also create one using the Search function at the top center - open the drop-down menu and select the 'Create Search Folder' option.

Read more in the Documentation: About Search Folders

Update: New licensing manager has been released for PRO license users and is available at http://licensemanager.emclient.com/

SilverLight is no longer needed for access to our License manager.

Chrome recently pulled their support of Silverlight and as a result, the only browser that you can use to access licensing.emclient.com is Internet Explorer. 

If you are using Windows 10, you can still access Internet Explorer - simply type Internet Explorer into search and launch it

All official themes are already included inside eM Client. You can view those in Menu > Settings > Appearance > Themes.

In eM Client 8, we introduced a new Theme editor with a direct WYSIWYG mode.

You can find all steps and tips in this article.
For example, if you want to enable wider scrollbars, you can now easily find the setting under Elementary controls > Scrollbars, and check the UseSystemScrollbar option.

Tip: The option to change this is now also available directly in menu > Settings > Appearance > Lists under Scrollbar style.

Don't have the time to design your own theme right now but the official themes don't fit your style?

You can also choose from our user-created Theme gallery.

After creating or downloading your new theme, you still need to Import it in Menu > Settings> Appearance > Themes and then select it from the Theme list to apply it.

LEGACY OPTIONS

Steps to follow for eM Client 7 and older:

1.        Select the theme you want to base your own theme on.
2.        Click the ‘Advanced’ button and select "Save current theme as..." – the theme file will be the saved as a .emtheme file.
3.        Open the .emtheme file in any text editor
4.        Adjust or recreate your theme using the available tags, each item is explained in the comment inside the file
5.        Save your theme file
6.        Go back to Themes settings
7.        Click the Import button and import your new theme
8.        Select it and Apply it
9.        You have successfully changed your eM Client theme! 

Example for direct XML edit:

If you just want to make a small change, for example, enable wider scrollbars, find the relevant line and change the True/False value.

<UseSystemScrollbar description=""Use system scrollbars with no automatic hiding"">False</UseSystemScrollbar>

Colors are saved in HEX codes, there are many sites that provide color pickers and provide you with the code - for example Color-Hex.

Note: User-made themes can also be found on our Forum, just search for 'Theme'.

Update 6/10/2022: Since Google discontinued their Less secure apps setting, you might not be able to use the account as POP anymore. Please read more in this article: Google ‘less secure apps’ access and what it means for eM Client

While Gmail's default (and preferred) email protocol is IMAP, we definitely support a POP protocol option as well. However, since it's not the available setting from Autodiscover, you will need to set up the account manually.

Gmail has a special secure login called oAuth, which natively supports only IMAP. However, a secure POP setup can still be created thanks to App-specific passwords.

You will just need to Allow access for Less secure apps (as POP connection is seen as less secure than IMAP with oAuth login), enable POP protocol in your Gmail settings and then enable 2-factor authentication to create an App password (a special password which will be used only for eM Client - so your actual Google password is safe).

Manual setup in eM Client is then available in the New Account window under Mail > Other.
There you can select the POP protocol, input your server settings and create your desired POP setup. Make sure to use the created App password instead of your main Google password.

Blacklist is managed in menu > Settings > Mail > Blacklist and whitelist. The ‘Manage Blacklist’ button will open a window where you can add or remove any email addresses or domains.

Local blacklist is available to everyone. From eM Client 10.1, we also offer support for server-side Blacklist as well as Whitelist for IceWarp and SmarterMail accounts.

You can read about the Blacklist and Whitelist feature in more detail in our blog post here: eM Client Blacklist & Whitelist

eM Client 9 and older:

You can view and manage the Blacklist rule in menu > Rules on Windows or in Tools > Rules on macOS. Just select the Blacklist and click the 'Edit' button.

A new window with all the domains and addresses in your blacklist will pop up and you can add new items or remove any of the email addresses and domains already in it.

If you want to set up just a separate calendar account or your available calendar account could not be found using the Automatic setup, you can definitely set it up manually.

•          First, go to Menu > Accounts, and click on the + Add account button.
•          Skip the Automatic setup and click the Calendar section instead.
•          Select the option that applies to your existing Calendar account and click Next to finish the setup.

Note: If you don't have an online calendar account but would want to have one to synchronize your calendar online to your other devices, you can register an account for free on platforms that provide an option to synchronize just your Calendars and Contacts (such as Fruux, for example).

Read more in the Documentation: About Calendar

After 30 days of using eM Client, you might encounter this message:

Demo expired

Your demo period has expired. Please obtain a valid eM Client license from http://www.emclient.com/purchase

You may access your offline data, but online synchronization and the sending of emails are disabled. Once a license is obtained, you will be able to use the product without limitations again.

This means you haven't activated a license within the period of the trial version.

If you already registered or bought a license, just take your Activation key and activate it in Menu > Help > License.

Otherwise please go register or purchase a license from our website. Please make sure to register the license to an email address that you have access to, as the license key will be sent there.

You can easily subscribe to an internet calendar of your choice via Menu > Tools > Subscribe to Internet Calendar. Simply copy the URL address of the calendar into the address field and you are ready to browse the calendar in the Internet Calendars section of your Calendar.

Please be aware that you can only use valid iCalendar links.

Read more in our blog: iCal Subscriptions

The Operations log can be very useful for troubleshooting, as it contains information about the Operations that were done during this run of the application. If there is an error message the Operations log might contain more detailed information about the error itself.

If an error message already popped up, the Log can be found in the third tab of the same Window. Otherwise, you can open this window manually in Menu > Operations. The Log is in the third tab of this window.

Simply click the Copy log button and then paste the text into a text editor (Notepad, MS Word, ...) via the Ctrl+V shortcut.

You can then search for your error message there in case the error details made the reason self-explanatory or you can send this log to the support so we can analyze it and provide advice.

Support options are described on our website in Support overview section. 

LEGACY OPTION

In older versions the Copy log button is not available, so you will need to copy the log manually.

• Open the Log tab and then click inside, to select a single line
• Press Ctrl+A keyboard shortcut to select all the lines
• Use Ctrl+C to copy the content
• Open a text editor (Notepad, MS Word, ...) and use Ctrl+V to paste the log there and then send it to support.

Yes, you can definitely use a number of startup parameters.

Here is a short overview:

    /dblocation PATH

    This parameter will determine which folder will eM Client load the main database from. If the given folder does not exist, eM Client will create the folder and a new, empty database in it. Without this parameter, eM Client will load the database from the currently set default location.

    /localmutex

   Use this parameter when deploying the application in a Remote Desktop Services or Terminal Services environment where accessing global mutexes (short for „mutual exceptions“ in programming) is forbidden – the application will use local ones instead.

    /mailurl RECIPIENT

    Use this parameter to create a new message with a pre-defined email address compliant with RFC 6068.
Example: MailClient.exe /mailurl "mailto:[email protected]?subject=hello&body=bodytext"

    /open PATH

    With this parameter you can open any .eml, .msg, .vcf, or .ics file in eM Client.

    /newmail

    This parameter will open a window to compose a new mail.

    /newcontact

    This parameter will open a window to create a new contact.

    /newevent

    This parameter will open a window to plan an event.

    /newtask

    This parameter will open a window to create a new task.

    /importsettings PATH [-s] [-p PASS]

    This parameter defines a file which contains eM Client settings and its password, which needs to be used to import the data. It needs to be an .XML file and can contain application settings, account configuration, templates, quicktexts, and rules. PATH is the location of the file. The rest of the parameter options are optional. [-s] stands for "silent" and means that the settings will be imported without opening the UI. [-p PASS] is for inserting the password, if there is one protecting the file.
Example: MailClient.exe /importsettings "c:\Temp\settings.xml" -s -p MyPassword

    /activate

    You can easily activate your eM Client using this parameter and activation key.

    This parameter can also be used without the Activation key, but for activation to be possible in this case eM Client needs to have a LastActivationKey entry in its database with a valid Activation key. Usually, the LastActivationKey value is set using the /importsettings parameter.

    /deactivate

    This parameter will deactivate the license in your device. This can be useful when you have a set number of seats on your license and want to quickly free up the space by deactivating the device you no longer plan to use.

Note: This answer applies only to Windows version.

Read more in the Documentation: Startup Parameters

When your email account is going to be canceled soon or your space on the server is getting filled up, you might want to create a local backup of your messages or download them from your server.
This applies mainly to IMAP and EWS accounts.

Here are steps to follow to copy your messages and/or folders to Local folders:

Make sure to have the option to ‘Show local folders’ enabled in Menu > Settings > General > Folders.

Note: In eM Client 9 and older this option is in Menu > Settings > General > General.

To copy folders:

1.        Right-click the folder you want to copy
2.        Select the ‘Copy folder...’ option
3.        In a new window select the ‘Local folders’ as the destination where you want to make a copy
4.        Confirm
5.        Wait for eM Client to copy the folder with messages
6.        Continue with other folders from the top

You can select the 'Local folders' directly if you want the folder to be at the same level as the ‘Local Inbox’, ‘Sent’, etc. If you select any of the folders directly, the folder you are copying will be a subfolder of that folder.

To copy just messages:

1.        Open the folder with messages
2.        Click one of the messages to bring focus to it
3.        Press Ctrl+A to select ALL the messages in this folder (or select the ones you want specifically using the Shift or Ctrl button)
4.        Right-click one of the messages (with all messages still selected)
5.        Use the ‘Copy to Folder…’ option in the drop-down menu
6.        Select the exact folder where you want to copy these messages to
7.        If you are copying from Inbox, select the Local Inbox, etc.
8.        Confirm
9.        Wait for eM Client to finish copying these messages
10.        Continue with other folders from the top

If you have a large number of messages that have not been previously downloaded for offline use, the copying can take some time. In that case, eM Client is downloading the messages fully for the first time so it takes longer than copying a message that is already downloaded in eM Client.

After the messages are safely copied, you can remove the originals from your account folders, in case you need to free up space on your email server.
The copies in eM Client's Local folders are safe from any external force.

Note: We do suggest enabling automatic database backups if you keep local copies of important messages, in case the files in your computer got corrupted or if your computer crashed.
You can backup manually using the Menu > Backup option or enable Automatic backup in Menu > Settings > General > Backup.

In eM Client 9, we introduced options for limited time synchronization. You can leave your message sync time period to All time or limit it to different time periods, from the last day to the last year.

You can set the time period individually for each of your accounts in Menu > Accounts on Windows and eM Client > Accounts on MacOS where you select the IMAP or Exchange Web Services tab, depending on the account.

We go into more detail and explore the benefits of limited time sync on our blog: Limited time sync

Automatic replies (also called "Out of office") can be enabled in Menu > Tools > Automatic Replies.

In the new window that pops up, you can select the email account to apply the Automatic reply to, set the First and Last day when the reply is to be sent and then input the Subject and Body of the reply itself.

The Automatic reply feature is currently available for Gmail accounts, Icewarp accounts, Imageway, SmarterMail, MDaemon, and accounts using Exchange protocol (Microsoft 365).

Read more in our blog: Automatic Replies in eM Client for tutorial and Out of office messages with eM Client for examples.

eM Client supports two specific kinds of Archiving features:

• Local automatic archiving inside the eM Client program and
• Server-side archiving.

Automatic Archiving

eM Client archiving can be found in Menu > Settings > Mail > Automatic Archiving.

The way eM Client archiving works is that the program will create a special set of local folders called 'Archive'. Archive folders will be shown below all your other account folders and Archived messages will be only available in your device. If you will choose to archive messages from a synchronized account (set up with IMAP or EWS protocols) the messages will be removed from the server as well, so you will no longer be able to access them using webmail.

To make the automatic archiving actually work you need to enable it, set how often the Archiving should happen (Archive every X days), set how old the messages should be (Archive messages older than X days) and most importantly, select which accounts/folders you want to perform the Archiving on (Account Preferences).

Click the ‘Archiving Scope’ field for each Account to select which folders should be included.

You can also perform the archiving manually by clicking the 'Perform Archiving' button. This function can be used even without enabling the Automatic archiving in the top checkmark (Enable Automatic Archiving).

Server-side Archiving

For IMAP and EWS accounts the Archive feature will move messages into a single folder called 'Archive', which will be among the other special folders like Inbox, Sent, Drafts, etc.
You can select a message (messages) and use the Archive option via right-click, toolbar button or the default shortcut Ctrl+Shift+A.

The shortcut can be changed in Menu > Settings > General > Shortcuts.

An exception to this is the Gmail Archive. This is a specific function which removes the 'Inbox' label from a message in Inbox, leaving the message accessible in the 'All Mail' folder. You can read about Gmail's native archiving and what it means on Google support. 

Read more in the Documentation: Automatic Archiving

Attachments view is a new section in the left pane. In this section you can load all attachments from your accounts and messages and easily search for the ones you need.

The Attachments view feature is only available with paid licenses.

Read more in the Documentation: Attachments 

You can assign an image to each of your accounts during the account setup or change the image at any time in Menu > Accounts. These avatars will help you determine which account your messages belong to in mixed views and search results.

These avatars are currently only stored locally – they are not the same as contact avatars downloaded from the domain or Gravatar.

To change the avatar your contacts might see when they receive your messages read this FAQ article: How do I change my own email account avatar?

Tags are labels you can use to attach a detail or category to a specific item. You can then use this tag to search for these items, look through special tag folders or just use the colors to make your data more organized.

You can manage tags in Menu > Tags on Windows or Tools > Tags on MacOS. When you create a tag, you can give it a name, assign a color and even a keyboard shortcut. You can then specify if the tag can be used for messages, events, tasks, contacts or notes or any combination of these.

If your items are synchronized with a server that supports the tags feature, they will be synchronized across your devices. Otherwise, the tags will be kept locally. Gmail labels are treated as Tags in eM Client.

You can also color-code your message list according to your tags. To enable this, select ‘Use color of tag as text color’ in menu > Settings > Appearance > Lists.

Note: Tags have been called Categories in eM Client 7 and all older versions of eM Client.

Read more in the Documentation: About Tags

AttachmentName and AttachmentContent keywords have been added to the search in the Mail section of the program, so you can now look for words directly contained in the attachments.You can use full-text search in eM Client for documents such as Word, Excel, PDF etc.

In the Attachments view (available with paid licenses), you can easily sift through the files directly - you can sort through files based on type, account or the item type it was originally attached to. Read more about the Attachments section on our blog.

Note: This feature is included with paid licenses.

The Watch for Reply feature is a button available in the toolbar of the New message window.

If you expect a reply to an important email you can set up a special reminder in eM Client.

You can either get a reminder for when such a reply is received to draw your attention to it or you can get reminded after a specific time frame that your message was not replied to, so you can reach out to the recipient again.

After you enable watching for reply a copy of the message will be saved in a special Favorites folder called Unreplied, so you can check which replies you're waiting for at any time.

You can also disable the reminder from this folder, should the recipient reach out to you via other means and the reminder is no longer needed.

Read more in our blog: Never miss important emails with eM Client's Watch for Reply feature and in the Documentation: Watch For Reply

Attention: These solutions can only work with eM Client 8.0 - 8.1, they will not work for legacy versions of eM Client. eM Client 8.2 and newer do not need this solution, as it is included natively.

eM Client supports MFA/oAuth login, but the pop-up window for this authentication method will not be allowed to be used by default on your device.
That is why the login method will not work natively for now, but we have prepared workarounds to help you out:

eM Client for Windows

• Download the attached registry file in this article.
• Run it while eM Client is still closed and confirm the changes it will make.
• Run eM Client and use the automatic setup to set up your accounts with oAuth.

If you'd like to add the needed registry key manually instead of using our provided file:

• Run Regedit
• Go to Computer\HKEY_CURRENT_USER\Software\eM Client
• Add the DWORD item AllowExchangeOnlineOAuth and set its value to 1
• Then run eM Client and use the automatic setup to set up your accounts with oAuth.

eM Client for MacOS

• Open the Terminal
• Execute this command:
• defaults write com.emclient.mail.client AllowExchangeOnlineOAuth -bool TRUE
• Run eM Client and use the automatic setup to set up your accounts with oAuth. 

WARNING: If you use this work-around please make sure to disable the 'Offline Address Book' service during the last step of the setup.It is not compatible with the oAuth setup and could cause additional problems with the setup.

Note: These same steps can be used to downgrade from a BETA version to the current eM Client official version - just uninstall the BETA and reinstall current version from the website

Our databases are not backward compatible for older versions and once you upgrade your database to accommodate the new version, you cannot just simply install an older version over it.

If you have a backup of your database from eM Client 9 or older you can skip any export. If not, you will need to export local data before the downgrade to keep them.

For accounts set up with IMAP or EWS protocol this is not an issue, as setting these accounts anew will synchronize messages and folders back from the server.

For POP accounts and any data in Local folders, export them first via Menu > File > Export and once you downgrade, you can import them back via Menu > File > Import.

The steps to downgrade on Windows are to:

• Export any local data you need to keep (menu > File > Export)
• Uninstall eM Client 10
• Either delete the database or rename it
• Install your preferred older version of eM Client (You can find older versions in our Release history)
• Restore from the backup (Menu > File > Restore) or create your accounts anew and import your local data back in (Menu > Accounts, Menu > File > Import)

If you want to just rename your database, the default location is in C:\Users\%username%\AppData\Roaming\eM Client

The steps to downgrade on macOS are to:

• Export any local data you need to keep (File > Export)
• Uninstall eM Client 10
• Either delete the database or rename it
• Install your preferred older version of eM Client (You can find older versions in our Release history)
• Restore from the backup (File > Restore) or create your accounts anew and import your local data back in (eM Client > Add account, File > Import)

If you want to delete or rename your database, the default location is in /Users/User Name/Library/Application Support/eM Client

If you upgraded by accident and aren't sure if you need to downgrade manually, please see the article on this topic - This version of eM Client is newer than what your current license permits.

You can upgrade to eM Client 10 by going to Menu > Help > Check for Update or by downloading it directly from our website.

IMPORTANT: Pro users whose licenses are only valid for eM Client 9 and older need to buy a one-time upgrade to Version 10 first, or their program will be in offline mode until they upgrade their license or revert back to their previous version.

Pro users with Lifetime Upgrades don’t need to make any additional purchases to access paid features in eM Client 10.

After your 30-day trial of eM Client expires, you can either continue using eM Client on a Free License (with limited functionality) or purchase a license.

After purchasing a license, simply enter your Activation Key by going to Menu > Help > License.

The release of eM Client 8 has brought enhanced search capabilities, including searching in the text of attachments and on IMAP and Exchange/Office365 servers. Sometimes though, searching through the mail server does not return correct/expected results, so it might be beneficial to turn off server search and search locally within eM Client instead.

To do this click on the down arrow v on the right side of the search bar and deselect Use server search if available. Also, while you’re in this search menu, double check that you’ve selected the correct search parameters, such as searching in All folders and searching for your keyword in the Subject, Sender, Recipients, Body and Attachments fields.

Read more in our blog: Search Like a Pro in eM Client

Generally, Pro Support is only available to Pro License holders for one year after their purchase, otherwise we direct Free users to our Support Forum.

However, since the new eM Client 8 was recently released, everyone is treated as a Pro user for a month and is contacting the Support Team for a large range of issues. This has greatly increased our number of new support tickets to 100s every day and created a backlog. Some of the issues are bugs that our users have caught and we can pass on the information to our developers to fix and make eM Client better for everyone.

We’re happy to help you and we promise that your ticket has not been forgotten or lost, but your patience is greatly appreciated during this time.

After uploading your Public Key to eM Keybook, you might have received a message saying:

Uploaded Public Key not Verified

Public Key John Doe for email address [email protected] was uploaded to eM Keybook, but has not been verified yet. Should eM Client keep monitoring for incoming verification emails?

This occurs when you have not yet checked your email to confirm that you would like to upload your Public PGP Key to eM Client. The message you should be looking for is called "Verification email from eM Keybook" and it will be sent from [email protected].

Furthermore, some email accounts (such as @seznam.cz, @yahoo.com, or @aol.com) have a problem if checking the message through normal means does not trigger the confirmation.

The workaround for this problem is as follows:

1. Right-click on the "Verification email from eM Keybook" message in your list of emails in your inbox and select "Save as" and then save the email as a .eml file.
2. With this .eml file you exported, go to your file explorer in Windows where you've saved it on your computer and open the file with eM Client.
3. When the .eml file is open click Menu > Message > Copy to Folder
4. Choose where you want to save a copy of the message in eM Client.
5. Navigate to where you saved the file within eM Client, and it should be displaying/working correctly and the verification will trigger.

eM Client uses external service for translations, so it has to pay for each translation made through its interface. For this reason, Free license users have limited access to this feature.

There are no limits for paid licenses.

Read more in our blog: On-the-fly Email Translation in eM Client and in the Documentation: Spell-checker and translator

Some servers might not support distribution lists and can therefore try to change the list into a regular contact, leaving only the first email address. To prevent this, please save your distribution lists into eM Client’s Local folders. The list will not be synchronized but you will be able to use it from the application’s interface.

Read more in the Documentation: Distribution List

The Snooze feature is available in the main toolbar and can be used to remove a new message from your Inbox for a specific amount of time before returning it back into the Inbox as a new message. This makes Inbox zero easier as you can deal with messages once you are ready or have time for them instead of having them clutter your incoming mail folder.

Read more in the Documentation: Snooze

eM Keybook is a public encryption key directory managed by the company eM Client.
It’s an online service where you can upload and manage your public keys so anyone can easily send you encrypted messages and you can easily get public keys of the recipients you want to send encrypted messages to.

eM Keybook stores Public keys that you upload and allows for the exchange of Public keys between all eM Client users. If the contact you’re writing a new message to has a Public key in the eM Keybook directory, eM Client will automatically download and apply it for you when you enable encryption for your message.

eM Keybook does not save nor have access to any of your Private keys or passwords. It does not give anyone access to your encrypted messages or save any of your encrypted messages on our servers.

Check out the article about Signing and Encryption for additional information.

Read more in our blog: eM Keybook: Email privacy for everyone and in the Documentation: About eM Keybook.

During the account setup you will be offered PGP encryption for your account.
With PGP keypair you can digitally sign your messages, so the recipients of your emails can be sure the message from you was not tampered with and they can send you encrypted messages that only you can read!

Read our manual on how to use email encryption.

Read more in our blog: PGP: Encrypt & sign emails in a few clicks and in the Documentation: PGP.

eM Client is distributed as a standard MSI package so you can use standard MSI parameters. You'll probably want to use /quiet or /qn for silent installation. All the MSIEXEC parameters should be supported though!

eM Client has three custom paramaters if you need a silent install:

All versions of eM Client can be found in our Release history.

There are two different ways to deploy eM Client and activate the license automatically:

1.        Deployment via Command Prompt

If the goal is to simply install eM Client and load the license, use the following command in Command Prompt: MailClient.exe /activate {insert activation key here}

Similarly, you can easily deactivate eM Client license by using: MailClient.exe /deactivate

2.        Automatic deployment

If a bit more complex setup is required, you can use our "Automatic deployment process" which allows you to push various sets of settings along with the license key too. Find more detailed instructions here. 

Read more in our blogs: eM Client Server Settings & Advanced Startup

Autodiscover is supported in eM Client so you should be able to set up all accounts easily.

OAuth for Google accounts and Exchange is supported as well.
OAuth for Google is fully automatic.
OAuth for Exchange is automatic in eM Client 8.2, for older versions please follow these instructions.

In case you need to set up an account manually, choose Mail > Other in the account setup window.

In case you need to limit certain functionalities in eM Client (restrain your users from using personal chat accounts or limit the number of email accounts they’re allowed to use) use the Server settings feature in License manager to push custom restrictions that limit eM Client’s capabilities.

For example:

<settings>
<restrictions>
<ChatRestriction><AllowedHostRegExp>emclient.com</AllowedHostRegExp></ChatRestriction>
<AccountCountRestriction><AccountCount>1</AccountCount></AccountCountRestriction>
</restrictions>
</settings>

For a complete list of restrictions contact our support department at [email protected].

If you have trouble connecting to the license server to activate your license, make sure to add https://licensing.emclient.com/ and https://licensemanager.emclient.com/ to exceptions in any security apps, VPNs or Proxies.

You can overview your licenses using our License manager and even remotely manage specific activations. Find out how to manage your licenses or assign centralized settings to your activations.

If you cannot find your License manager login credentials, you can reset them here.

Please keep in mind that the credentials are case-sensitive and do not contain any whitespace characters.

The easiest way of moving your database to another device is to make a backup of your current database in Menu > Backup.

eM Client will back up the whole application database into the folder selected in Menu > Settings > General > Backup. You can also enable the option of automatic backups in regular intervals here.

You can transfer this backup to a device of your choice and restore from it through Menu > File > Restore.

Read more in our blog: How to work with automatic backups in eM Client

You can change the Reply-to address for your messages via the Menu>Message>Reply to address option in the Compose message window.
You can either select one of your eM Client accounts or use a custom address.

On June 15th, 2021 Google phased out the Google Contacts API, which is a protocol we used for synchronizing Google contacts in older versions of eM Client. If you are still running one of these versions, you will encounter this error:

[Google Contacts] Synchronizing folder '[email protected]/Contacts' failed due to the following error: Execution of request failed:

(Contacts API is being deprecated. Migrate to People API to retain programmatic access to Google Contacts. See https://developers.goog.ecom/people/contacts-api-migration.)

We have switched to the current People API in eM Client 8.2, so if you are running any of the older versions, you need to either install the update (if your license is valid for eM Client 8) or upgrade your license and then install it.

You can of course keep using the older version if you prefer, but you will not be able to synchronize your Google contacts anymore, they will only be stored locally as they are.

To avoid the error pop-up, you can work around this situation by copying the contacts to Local Folders and switch off the Google Contacts service in Accounts settings.

Go Daddy servers are rejecting the version of Chromium in our application, so the secure OAuth login in our native browser window during the account setup could not finish. The error messages that shows up when this happens is:

Your Browser is a bit unusual...
Try disabling ad blockers and other extensions, enabling javascript, or using a different web browser.

We have created a fix version which will use your default web browser instead of our native window for this authentications. Please download this version here: https://www.emclient.com/dist/v8.2.1509/setup.msi

You can start an Online meeting instantly via the New > Online meeting option.

However, to plan one in advance, you need to use the New > Event option instead.
On the first run you can decide whether you want to create a standard event or online meeting.
You can also select a default for future cases or just pick each time.

You can of course then choose which Online meeting provider should be used or even change your mind about the event type while creating the event itself.

Read more in our blog: How to set Online Meetings in eM Client

This means that your license is activated on the number of devices your license was purchased for. You need to ‘free’ up some seats to use the same license on new devices. Either deactivate the license on the older device (Menu > Help > License) or if you do not have access to it anymore, use our License manager to remotely deactivate the older activation.

One of the largest certificate issuers Let’s Encrypt had their root certificate validity end on 30. 9. 2021. In case your validity has not been renewed, an error might occur with eM Client licensing and other programs as well.

How to check your certificate validity in Windows?

1. Navigate to the Start menu in Windows and type certmgr
2. Open the Certificate Manager app by pressing enter and allow changes
3. In the left window navigate to Third-Party Root Certification Authorities
4. Click on the file Certificates that shows up
5. Go to the right side and find ISRG Root X1 in the ‘Issued to’ column- it is ordered alphabetically
6. Check the expiration date in the third column

Now, in case your certificate has validity to 30.9.2021 it means it is past due. 

Here is how to solve the problem.

1. Download the attached file 'ISRG Root X1.cer' and open it on your PC
2. A window pops up, click on Install Certificate
3. Click Next on the following screen
4. Check the option to Place all certificates in the following store
5. Click Browse and select Trusted Root Certification Authorities and click OK
6. Click on Next and then Finish to import the certificate

How to solve this issue on Mac?

Remove the old ISGR Root X1 certificate from your Keychain and then download the attached file 'ISRG Root X1.cer'

This article applies to eM Client 9 and newer.

The Read/Unread status in compact layout

With the introduction of Avatars in the message list the behavior of marking message as read/unread and assigning a flag has changed. 

At first, you see the unread orange dot as usual:

But if you hover, the Flag option shows up instead so you can easily flag the message in one click.

The flagged/unread message then looks like this:

So that means you can easily add or remove the flag in a single click, but this functionality is not available for switching the unread state of the message to read and vice versa.

Once the message is marked as read, you cannot set it back via the message list icons - only through the mark options via right-click, toolbar button or a keyboard shortcut (R to toggle Read and Unread).

Many cons and pros of having both buttons available and clickable were considered, but in the end, a design decision was reached - the unread dot does not look good when it is not centered with the avatar (and only one icon is shown at the top).
When trying to display the unread dot and flag only on hover (same way as in eM Client 8) it causes the icons to change positions and may lead users to click the wrong icon by accident. This is why we decided to show only one centered icon in this situation.

You can also enable the option to "Always show "read" and "Flagged" icons on mouse hover" in menu > Settings > Mail > Read under the Message List settings.

If you would like to avoid this completely you can return to the same setup as in eM Client 8 if you disable the Avatars in the message list. 
Simply right-click the top of the message list and open Columns configuration. 
Select the Avatar from the "Show these columns" list on the right and then click the Remove button, which will move it to the list on the left, "Available columns".

The Read/Unread status in single-line layout

In menu > Settings > Mail > Read, the Message List settings, you can also switch from compact layout to single-line layout. In this view, the Flag and the Read status will appear in two separate columns, and you can simply click into either to toggle the flag or the read status.

The Unauthorized License Detected warning should show up if you are using an illegal version of eM Client, which is detected by your System checking eM Client's program file signatures. Recently, some users encountered this warning even with a valid program and license, because of an outdated certificate in their device.

In the current versions released after January 2023, eM Client now uses Azure Code Signing to sign its program files. The Windows version of the app is signed using a Microsoft certificate to prove its validity and safety when used on Windows devices.
So if you encounter this warning, please make sure to have the latest Windows update on your device installed.

If you do have the latest updates, you can check and/or install the missing certificate directly.

Go to the eM Client installed program files, default C:\Program Files (x86)\eM Client.
Find MailClient.exe and open its Properties.
Open the Digital Signatures tab.
Click the eM Client s.r.o. signature in the list and open Details.
Check the signature here.
If it's shown as invalid, select the Microsoft signature at the bottom and open its Details.
Then click View Certificate button and check the Certification path.
if there is any Microsoft certificate missing (a red X over the certificate icon), install it or add it to trusted certificates.

You can find Microsoft certificates in their repository here: https://www.microsoft.com/pkiops/docs/repository.htm
Search for the name of the missing certificate, download it, and when installing it make sure to select the folder (store) manually and save it into Trusted Root Certificates Authorities.

That should resolve the issue - restart your device and start eM Client again.

For eM Client 9.2.1222 and older you can use this solution:

To check if you are affected by this problem, please check this webpage: https://trusted-root-g4.chain-demos.digicert.com/
If the page shows a warning, you need to update your root certificate DigiCert Trusted Root G4.

This can be sorted by installing available security updates for your Windows or you can find the updates manually here: Support for urgent Trusted Root updates for Windows Root Certificate Program in Windows

You can also manually download the certificate here: 

DigiCert Root Certificates | DigiCert.com

Direct download for DigiCert Trusted Root G4 | DigiCert.com

To avoid similar issues in the future, make sure you have the Windows Root certificate AutoUpdater active.
This can be changed in Windows registry directly in HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\SystemCertificates\AuthRoot
Just make sure the DisableRootAutoUpdate key is set to 0.

If the issue is not resolved even after manually updating or re-installing the missing certificates, you can reinstall the app in case the issue was in the corrupted program files.
Follow these steps:

- Uninstall eM Client (do NOT delete your database)
- Make sure the eM Client folder and files are gone from C:\Program Files (x86)\eM Client or C:\Program Files\eM Client
If not, delete them manually.
- Then download and install the app for your licensed version from an official file downloaded from our website: https://www.emclient.com/release-history

In June 2022 Google discontinued their support for less secure login methods for their email accounts. The solution to this is to set up your account anew using the secure OAuth method.
Please read more here: Google ‘less secure apps’ access and what it means for eM Client

When a new official update is ready, eM Client will offer you an 'Automatic update' next time you run it. We recommend installing the update but if you don't have the time and would prefer to install it later, you can click the 'Later' button and choose to postpone the update for 1 Day, 2 Days, 3 Days, 1 Week or 1 Month. If you click the X button in the top right, the Update will not be installed and the window will pop up on the next startup.

You will never receive an update prompt that your activated license is not valid for, but if you'd rather just use an older version indefinitely and don't want to reject updates every month, there can be a manual update limit set on your license and activation.

Business license owners can set this limit (called "Set Version") via the License Manager. Just open your Activations tab and click Set Version. Select the version you want to use from the list and save this setting.

Free or Personal license users can send a request for an update limit to [email protected]

eM Client will always try to use the newest TLS protocol available, which of course includes current TLS 1.2 and TLS 1.3 (on macOS, eM Client currently only supports TLS 1.2).

If you've received any of the following emails from your provider:

We are contacting you because one or more of your devices or programs uses the TLS 1.0 and/or TLS 1.1 encryption protocols to connect to our email servers, or is using an unencrypted connection.

We will no longer support TLS v1.0

Then you shouldn't have to worry with eM Client, as it can and will use a more secure connection when available.

If you are using Windows 7 or older system though you might need to make sure that your device supports TLS 1.2, but it can be manually enabled on Windows 7 if needed. Here's a tutorial you can follow or you can run this Registry file.

Update 3/2/2023: We have created an alternate workaround which uses AirSync instead of SMTP for sending emails, read more here. 
The new workaround is for eM Client 9.2, so if you use an older version of eM Client and do not wish to upgrade, please feel free to still use the workaround on this page.

In the past few days, users of @outlook.com, @hotmail.com and other free Microsoft email accounts might have encountered an issue when sending emails. 

[SMTP] MailClient.Accounts.AuthenticationAbortedException: Authentication aborted.

This issue is caused by a new problem on Microsoft's modern OAuth login method, settings up the account with an older version of the OAuth authentication in the meantime will work.

For the workaround, follow these steps:

Windows

• Close eM Client.
• Revoke permission for eM Client in your Outlook.com account: https://account.live.com/consent/Manage
• Download and run the registry file in this article - useoldoutlookcomflow.reg
  (this file can be downloaded at the bottom of this article, in the Attachments section)
• Open eM Client and log in using the OAuth window that pops up.

macOS

• Close eM Client.
• Revoke permission for eM Client in your Outlook.com account: https://account.live.com/consent/Manage
• Open Terminal and run this command: defaults write com.emclient.mail.client UseOldOutlookComFlow -bool TRUE
• Open eM Client and log in using the OAuth window that pops up.

Once Microsoft fixes this issue, you can either keep the older OAuth or remove the workaround with these steps, which are just the reverse of the previous ones:

Windows

• Close eM Client.
• Revoke permission for eM Client in your Outlook.com account: https://account.live.com/consent/Manage
• Download and run the other registry file in this article- removeoldoutlookcomflow.reg
• Open eM Client and log in using the OAuth window that pops up.

macOS

• Close eM Client.
• Revoke permission for eM Client in your Outlook.com account: https://account.live.com/consent/Manage
• Open Terminal and run this command: defaults delete com.emclient.mail.client UseOldOutlookComFlow
• Open eM Client and log in using the OAuth window that pops up.

If you experience problems with eM Client not behaving as default mail client for opening mail files, using Mailto links from web, etc. there might be a specific default setting missing in your system.
The best way to resolve it is to go to your System settings > Apps and then 'Set defaults by app' (Windows 10) or 'Default apps' (Windows 11).

From the list of installed apps select eM Client and then assign all available file and link types to make eM Client function fully as a default app for all email and calendar functions.

If you experience issues using the Send to > Mail recipient function in Windows, the attached registry file can help - simply download it and run it.

You can look up eM Client in your Google Store or use this link.

Yes, the mobile version of eM Client for iOS and Android has also been implemented to work on tablet devices.

Data files are separate databases that can be connected to your eM Client - you can mount or unmount them based on current need.

You can convert other message files (such as PST or OST) into a new data file, using the menu > File > Import option or mounting it via menu > Data Files section.

You can read more about data files in our blog: Stay in charge of your data with eM Client Data Files

If you set a custom location for your database and the location is not available (for example external drive that is disconnected), you might have trouble running eM Client.
To delete the custom storage location setting open the Terminal and run this command:
defaults delete com.emclient.mail.client DBLocation

Update 10th July 2025: eM Client in versions 9.2.1628 - 10.3.2412 used AirSync instead of SMTP to send emails for free Microsoft email accounts - these are any accounts with domains @outlook.com, @hotmail, @live, @msn and other domains which Microsoft offered in the past, with all regional variants as well.
This change was made a few years ago when Microsoft broke SMTP Authentication for 3rd-party apps, making it impossible for us and many other apps to send emails.
You can read about this on our blog: https://www.emclient.com/blog/workaround-for-the-sending-issue-via-smtp-for-microsoft-outlook-com-accounts-570
Versions newer than 10.3.2545.0 now use SMTP again so the workaround below is no longer needed.

While AirSync does not suffer from the authentication issue at this time, Microsoft does not let it use ALL sending features - namely, any alias will revert to your primary email and send the email from primary address instead of your desired alias.
This, of course, does not affect users who don't need alias for these specific accounts, but if you need the alias feature to work correctly, you'll have to manually switch to SMTP.

Follow the steps below:

Windows

• Close eM Client.
• Open Start menu and type in REGEDIT and press Enter to open Windows Registry
• Go to Computer\HKEY_CURRENT_USER\Software\eM Client
• Right-click inside this section and create New > DWORD
• Name it UseAirSyncSendMail and save - this should set it to 0

macOS

• Close eM Client.
• Open Terminal and run this command: defaults write com.emclient.mail.client UseAirSyncSendMail -bool FALSE

On macOS and iOS, some eM Client users experienced SMIME certificates error “unknown revocation status.” This also affected some HTTP services, such as the automatic translation.

This is caused by the fact that Apple’s system does not always properly handle certificate revocation checks after Let’s Encrypt deprecated Online Certificate Status Protocol (OSCP) method in favor of Certificate Revocation Lists (CRL). We suspect that Apple does not take CRL into account at this time and since OCSP is no longer available, the status is left "unknown."

eM Client offers a setting, IgnoreUnknownRevocationStatus, to control this behavior now, which has 3 options:

The default behavior since eM Client 10.3.2298 will now ignore this specific error, but you can use these commands to change it:

To explicitly allow SMIME certificates to work, run this command in the terminal:
defaults write com.emclient.mail IgnoreUnknownRevocationStatus -int 1

To Enforce strict validation (this might also block other HTTP services, including eM Client's translation, QR Import, EWS Servers and more):
defaults write com.emclient.mail IgnoreUnknownRevocationStatus -int 0

To return to default behavior:
defaults delete com.emclient.mail IgnoreUnknownRevocationStatus

To speed up email address suggestions when composing an email, go to menu > Settings > Mail > Compose and disable “Use all recipients from Sent folders for suggestions” under Email Address Suggestion.

Depending on your email history, this option can cause a significant delay since the app needs to load recipients from Sent folders across all your added accounts each time you're composing an email.

Disabling it should resolve the issue, but if you still experience slow address suggestions, you can also try using the Clear recipient history button or deleting specific irrelevant addresses via the Show recipients button. If you only want to use your Contacts for the autocomplete, disable “Store composed mail recipients for suggestion”.
Read more on this feature on our blog.

If you need to show our support team what’s happening on your screen, a screen recording can be more helpful than a screenshot.

Screen recordings on Android:

• On most Android phones:
  • Swipe down from the top of your screen to open the top menu and look for a “Screen recorder” button.
  • Tap it and “Start recording”. A few seconds later, it will start recording.
  • To stop the recording, tap the square button on your screen. The video will be saved to your Gallery app.
• To share in a new message:
  • Tap the Share button (three connected dots).
  • Select eM Client or another email app. A new message will open with the video attached.
• To share in a reply:
  • Open the reply you’re writing and add the video as an attachment (a paperclip icon).

Screen recordings on iOS:

• On most iOS phones:
  • Open Settings > Control Center > Customize Controls. Tap the plus sign next to Screen Recording.
  • Tap the gray Record button. Three seconds later, it will start recording.
  • To stop the recording, tap the red Record button. The video will be saved to your Photos app.
• To share in a new message:
  • Tap the Share button (a box with an upward arrow).
  • Select eM Client or another email app. A new message will open with the video attached.
• To share in a reply:
  • Open the reply you’re writing and add the video as an attachment (a paperclip icon).

Looking for how to record your screen on your computer?

If you need to show our support team what’s on your screen, taking a screenshot is the easiest way.

Screenshots on Android:

• On most Android phones:
  • Press the Power button and the volume down button at the same time.
  • Or: swipe down from the top of your screen to open the top menu and look for a “Take screenshot” button.
  • The video will be saved to your Gallery app.
• To share in a new message:
  • Tap the Share button (three connected dots).
  • Select eM Client or another email app. A new message will open with the image attached.
• To share in a reply:
  • Open the reply you’re writing and add the image as an attachment (a paperclip icon).

Screenshots on iOS:

• If your iPhone uses Face ID:
  • Press the side button and the volume up button at the same time.
• If your iPhone uses Touch ID:
  • Press the side button and the Home button at the same time.
• To share in a new message:
  • Tap the Share button (a box with an upward arrow).
  • Select eM Client or another email app. A new message will open with the image attached.
• To share in a reply:
  • Open the reply you’re writing and add the image as an attachment (a paperclip icon).

Looking for how to take a screenshot on your computer?

In April 2026, Microsoft made changes to the AirSync protocol. Because of this, some free and personal Outlook accounts can no longer send messages in eM Client 9. This version uses AirSync protocol for sending by default, so you may see the following errors when trying to send emails:

• VersionNotSupported
• The input string '' was not in a correct format.
• Invalid namespace Meeting Response

If you want to keep using version 9, you can switch the sending protocol from AirSync to SMTP.

On Windows:

Close eM Client. Download and run this configuration file to update the Windows registry.

You can also change it manually if you prefer:

• Run REGEDIT in Windows Start menu
• Navigate to HKEY_CURRENT_USER\Software\eM Client
• Right-click > New > DWORD and name it UseAirSyncSendMail

On macOS:

Close eM Client. Open Terminal and run this command:

defaults write com.emclient.mail.client UseAirSyncSendMail -bool TRUE

After switching to SMTP, open Menu > Accounts (or eM Client > Accounts on macOS) and disable AirSync under Services. This stops the errors, but Outlook calendar and contacts will no longer work. You can use the local calendar and contacts or add these services from another provider.