I'm using WHM/Cpanel -- I'm pretty familiar with it. I'm on a VPS.

POP3 mail is not working, nor is IMAP mail. All three of the webmail interfaces stopped working, so I tried using a mail client. There's a connection taking place, but the password is coming back as wrong, which is what the webmail interfaces all said, too.

Squirrelmail gives this error:

Bad request: The IMAP server is reporting that plain text logins are disabled. Using CRAM-MD5 or DIGEST-MD5 authentication instead may work. Also, the use of TLS may allow SquirrelMail to login. Please contact your system administrator and report this error.
The others just say bad password.

POP3 says bad password.

Exim is running, cpop is running, imap server is running.

Please help. I have no email at this point on my server at all.