dovecot - Oct 2008 - pop3-login: Internal login failure (auth failed, 1 attempts)

Hello

I have a user that experience troubles with it's pop3 client (eudora)
at random time/hour the dovecot server refuse the connection to his
machine during several  minutes then it restart normally to download its emails
...

the message is like the following :

dovecot: Oct 09 15:36:35 Info: pop3-login: Internal login failure (auth failed,
1 attempts): user=<xxxxxxx>, method=PLAIN, rip=147.215.50.48,
lip=147.215.1.3, TLS
dovecot: Oct 09 15:41:35 Info: pop3-login: Internal login failure (auth failed,
1 attempts): user=<xxxxxxx>, method=PLAIN, rip=147.215.50.48,
lip=147.215.1.3, TLS
dovecot: Oct 09 15:46:35 Info: pop3-login: Internal login failure (auth failed,
1 attempts): user=<xxxxxxx>, method=PLAIN, rip=147.215.50.48,
lip=147.215.1.3, TLS
dovecot: Oct 09 15:51:35 Info: pop3-login: Internal login failure (auth failed,
1 attempts): user=<xxxxxxx>, method=PLAIN, rip=147.215.50.48,
lip=147.215.1.3, TLS
dovecot: Oct 09 15:56:35 Info: pop3-login: Internal login failure (auth failed,
1 attempts): user=<xxxxxxx>, method=PLAIN, rip=147.215.50.48,
lip=147.215.1.3, TLS

I run dovecot 1.1.4 (compiled on the machine) onto a debian etch 64 bits machine
(IBM X3650)

The passwd is memorized by the client so it is not a typo error of my
(experienced) user
who is a Computer science professor.

Thank you

On Oct 10, 2008, at 2:19 PM, Frank Bonnet wrote:
> dovecot: Oct 09 15:36:35 Info: pop3-login: Internal login failure  
> (auth failed, 1 attempts): user=<xxxxxxx>,
Internal login failure means that it should have logged a real error  
message. The error messages may be elsewhere than these informational  
messages. See http://wiki.dovecot.org/Logging

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