Bug? Dovecot cannot auth in AWS AMI for Plesk 12

[HoracioS]

This is a fresh installation in AWS using AMI for Plesk 12.
When installed with Dovecot I got this error when trying to login to mail:

Jun 28 12:23:44 server1 dovecot: imap-login: Disconnected (auth failed, 1 attempts in 2 secs): user=<[email protected]>, method=DIGEST-MD5, rip=127.0.0.1, lip=127.0.0.1, secured, session=<mfryjpUZdgB/AAAB>

If I switch to Courier works perfect:

Jun 28 12:35:53 server1 courier-imapd: Connection, ip=[::ffff:127.0.0.1]
Jun 28 12:35:53 server1 courier-imapd: LOGIN, user=[email protected], ip=[::ffff:127.0.0.1], port=[35677], protocol=IMAP
Jun 28 12:35:53 server1 courier-imapd: LOGOUT, user=[email protected], ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=52, sent=156, time=0

In normal servers or under Virtuozzo (formerly Parallels Cloud Server) Dovecot works without problem.

Best regards,
Horacio

 

[IgorG]

What is output of following command:

# dovecot -a | grep disable_plaintext