On Wed, 2010-11-17 at 13:45 +0100, Attila Nagy wrote: > Nov 17 11:42:10 be dovecot: pop3-login: Internal login failure (auth > failed, 1 attempts): user=<user1>, method=PLAIN, rip=172.28.16.20, > lip=172.16.253.13
Something else really should have been logged just before this. An error or a warning. There were a few situations where it might not have, which are fixed by this patch: http://hg.dovecot.org/dovecot-2.0/rev/aec1f1614028
