[Dovecot] Dovecot - T-Bird - RETR command failed

[Timo Sirainen]

On Tue, 2008-08-26 at 13:42 -0600, Calvin Gordon wrote:
> I have recently installed new untangle firewalls ( untangle.com) in 
> Bridge mode at two office locations. Both offices collect mail from a 
> Fedora 9, postfix,dovecot server at location #1. Since the install of 
> the untangles i have been plagued by Thunderbird Errors while trying to 
> POP email.

That strongly implies the problem is with the new firewalls.

> Aug 26 13:58:41 mailserver dovecot: POP3(username): Connection closed 
> top=0/0, retr=1/6987, del=0/1, size=6970

Dovecot sees that the connection gets closed unexpectedly. Most likely
by the firewall that was inspecting the POP3 traffic and found something
it didn't like (or caused it to hit a bug or something).

The problem probably goes away if you enable SSL. Or maybe you could
configure the firewalls not to look inside the POP3 traffic.

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