[Dovecot] Differences between IPv4 and IPv6 authentication

[Timo Sirainen]

On Tue, 2010-11-02 at 15:02 +1300, Tony Meyer wrote:

> With the external connection to IPv6 nothing at all gets written to
> the Dovecot log.  (External IPv4 works fine).  If I do an SSL
> connection I get only this for external IPv6:
> 
> """
> 2010-11-02 02:51:38 imap-login: Info: Disconnected (no auth attempts):
> rip=178.63.10.79, lip=188.40.178.56

Those are IPv4 addresses, so if you really were connecting with IPv6
something changed it to IPv4 in the middle.

> I'm afraid that still leaves me stumped.  Any further suggestions?

Are you sure IPv6 works at all in the server? Or maybe it has firewall
settings to disallow imap port for IPv6.

Anyway, the problem clearly isn't with Dovecot.