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 info@emclient.com (if you're still using the Trial version) and we’ll do our best to resolve the issue as soon as possible.

This option will be available either from the window informing you about the results of the database check or from eM Client’s interface in Menu > File > Restore.

If you can’t access eM Client to restore the data, please follow the information below on starting with a new database to open the program.

To start with a new database, turn eM Client off and rename the "eM Client" database folder (default location is in hidden folders AppData\Roaming, the whole path is C:\Users\%username%\AppData\Roaming\eM Client) to e.g. ‘eM Client old database’.

Please note that eM Client must stay turned off during this process. Check for eM Client or mailclient.exe in the Task Manager and if you see a process with either of these names, end it before you proceed.

If you do not have a backup but still have all your data saved on the server, you will have to start with a new database, re-create your accounts from scratch and wait until the data is synchronized again.

Common causes for this include:

• Duplicate setup - make sure each of your accounts is set up only once in Menu > Accounts, or all messages will appear twice in Favorite folders
• Rules - do you have any rules that are meant to copy incoming messages? Check the Menu > Rules to make sure that there isn't a rule creating unwanted copies.
• Forwarding - do you perhaps have a server-side forwarding set for one of your accounts? If you don't want messages from one account to always be forwarded to another, check your server rules, for example through webmail

Note: In eM Client 6 this problem also sometimes happened with Gmail accounts, which keeps a copy of each message in All Mail folder and also created copies in Important and Starred labels.
Since eM Client creates a separate folder for each label, emails that have multiple labels attached to them will have multiple copies saved. The only workaround for that issue is to disable the showing of redundant labels like "Starred" and "Important" in IMAP. You can find this option by opening a web browser and logging in to Gmail. Click on Settings, and then go to the tab at the top called "Labels".

Since eM Client 7.0 we have adapted Gmail's internal structure. All messages have just one copy in the All Mail folder and other folders are just assigned labels.

If you’d like to search inside the messages, you can download your messages for offline use.
This setting is available in Menu > Accounts - the account that you’d like to download the emails for - IMAP tab - Offline - "Download messages for offline use".
You can also include images and attachments (if you want to search inside text attachments).

POP and EWS accounts download full messages automatically.

If you are redirected on the server and the names can’t match, you can also choose the possibility to connect with the current settings and remember this choice.

Both options will store your emails locally as POP3 accounts do not keep your items synchronized with the server and are only used to download new data. Having the account in the left pane will allow you to move the account in the list of your accounts, having it listed under local folders will, on the other hand, reduce the number of listed accounts.

This choice cannot be changed after the setup, you will need to set up the account anew. Be careful not to accidentally remove your messages when doing so, you can always create both setups at once, copy your messages and then remove the unwanted setup.

While the startup synchronization is being processed by your server, it's possible the request for downloading body content may have timed out and can be run again once the folder sync is finished.

To avoid this, try to enable the "Download messages for offline use" on your account or one of your folders – for example, your Inbox.

To do so, navigate to your account settings, IMAP, and check the option to download messages for offline use, or right-click your folder, navigate to its properties and enable the option for selected folders only.

Don't worry though – eM Client should be able to automatically reconnect if the connection error is thrown unless there's a real problem on the server.

You can find more details on what causes this connection issue in the third tab called Log in Menu > Operations. If you need help analyzing the problem, get in touch with our support.

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

Try to delete the local changes to stop the synchronization – if this cannot be done manually or the error message cannot be closed (or keeps reappearing) it might be best to clear the local cache memory in eM Client for this account and download the correct data from the server.

Simply right-click the affected folder (calendar, contacts folder, etc.), select Properties and open the Repair tab. Click the ‘Repair’ button and wait for the resync to finish.

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.

The buttons are located in the same place for all localizations, so follow these screenshots to find your way to the language settings:

1. On Windows: Open menu > Settings in the main window. Menu is in the top left corner of the program, Settings is a 9th item on the list in the drop-down menu. On macOS: Open eM Client > Settings, the 9th item on the list in the drop-down menu.

2. This will open the Settings window. Here you want to open the General > Language section. General is the very top section while Language should be the 3rd one in the list below. 

3. Then just select your preferred language and press Ok.     

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.

However, if you go to Menu > Tags and create a new tag with the same name as your Label, you will be able to select your own color in eM Client.

This workaround will work for all top-level Folders/Labels, not subfolders.

1. Menu > Settings > Mail > Read

The Preferred Style setting in this section will be applied to the messages you read, if they use Plain text. Plain text format does not have any set "visual" formatting, so you can apply your own.
This way you can make the font easier to read for you.

The setting will not be applied to HTML messages, which do have set formatting.

2. Menu > Settings > Mail > Compose

The Preferred Style in this section will be used for writing all your messages.

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.

To remove items from the More folder, simply drag them out of it. Once there's nothing in the folder, it will disappear. To add items back, simply right-click an item and select Hide.

Alternatively, you can manage which items are hidden under the More folder or shown on your folder list by right-clicking your email account name in the folder list and selecting Show/hide folders.

However, if you still want to monitor the progress of your sent emails and updating folders, you can open the Operations window by going to Menu > Operations.

If you want the Operations window progress bar to always be displayed as you send and receive messages, you can turn on this feature under Menu > Settings > General > General > Operations Window and select the box for Show window on send and receive.

You can also adjust your suggested recipients list by going to Menu > Settings > Mail > Compose > Email Address Suggestion.

Suggestions based on messages in Sent folders and Recipients history based on your use in eM Client can be turned off; suggestions based on your saved Contacts cannot be disabled.

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

Read more in the Documentation: Distribution List

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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

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

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.

Please open the Terminal and run this command to add back any missing apps:
/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -seed

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

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.