IMAP and SMTP password failure

Yesterday i could not send or receive mail
The error appears to be related to a password for the IMAP and SMTP
Can anyone please help?

And the COMPLETE error is?
Server host?
eM Client version?

put in the correct password.

Try logging in with webmail to check the user and password. If it works, then it is some other setting. If it does not work, then reset your password.