[Dovecot] authentication failure messages in log

[Daniel]

Hi

I'm using Dovecot  1.0.stable branch on a production Fedora Core 3
server. All is running very well other than I getting tons of these
messages in the log (/var/log/messages):

Nov 26 13:38:56 bmw unix_chkpwd[19360]: password check failed for user
(xxxx)
Nov 26 13:38:56 bmw imap(pam_unix)[19359]: authentication failure;
logname= uid=0 euid=0 tty= ruser= rhost=x.x.x.x  user=xxxx

However the sessions are authenticating correctly and the user is able
to down load the mail fine.

I have tested this. I send mail to an account then login and download
the mail correctly, however my session gets the above in the messages
log. Each log on to dovecot get ones of these messages in the log. It
making the log file large.

Any idea on what it is?

Regards
Daniel
-- 
"Unix is simple. It just takes a genius to understand its simplicity."
--- Dennis Ritchie