''<p>dimo_nik [[#question-1311478|said]]</p>'' <blockquote>Good time of day. Question for the developers. I can't go to the Yandex post office. Writes: Error logging into the server "imap.yandex.com" with the user name "dimo-...........". and the button to repeat or enter a new password. Password has not been changed. Yandex mail is accessed via a browser without any problems with the old password. What is needed is not clear. Can you tell me what to do? Other mail and gmail can be accessed without any problems. Thank you. </blockquote> What's the authentication method for the incoming and outgoing servers? For Yandex, if it's 'normal password', change it to OAuth2, restart TB, enter the account password in the OAuth window. Check that cookies are allowed in TB Options/Privacy & Security. The same applies to gmail accounts - use OAuth2.