Issue to connect to account

What is reason of error below, to connect to my account?!Ai8CrEskdewXs1gRsen3FFhd6SFT

Can you please post your screenshots in the question like this rather than linking to another site, otherwise when you delete the file from your OneDrive, then your question on this forum becomes incomplete.

Anyway, this error means that there is either an issue with the server, or with your settings.

If it is the server, please contact your email provider.

If it is your settings, please go to Menu > Tools > Accounts and click on the IMAP tab for this account. Make sure that the port and security policy is one of the following combinations:

Port 993 = Use SSL/TLS on special port (legacy)
Port 143 = Use SSL/TLS if available

Restart eM Client and try again.

If there are still issues, please temporarily disable any anti-virus/firewall or VPN application, then try again.