Dear, on a master-slave configuration with an our centos 6.4 server with dovecot (everything to the latest version) we got a problem on mail forward account. The forward is correctly written on database, but when a try to send an email to that forward, we reach user unknown. Someone can give us any clue to what to start in order to debug that problem? Thank you.
Please post the error from /var/log/maillog file that occur when you send an email to that forward. Forwards are handled by Postfix, not dovecot. Dovecot is just the pop3 and Imap server.
