IPv6 auth failed

[Aki Tuomi]

> On 09/08/2020 09:53 Lefteris Tsintjelis <lefty at spes.gr> wrote:
> 
>  
> On 9/8/2020 9:51, Aki Tuomi wrote:
> > 
> >> On 09/08/2020 09:15 Lefteris Tsintjelis <lefty at spes.gr> wrote:
> >>
> >>   
> >> I am using latest Windows Thunderbird 68.11.0 and dovecot 2.3.10.1_2
> >> with FreeBSD 12.1-RELEASE-p8. Whenever I enable dovecot IPv6 and I try
> >> to login I get auth failed.
> >>
> >> Aug 09 08:36:11 imap-login: Info: Disconnected: Inactivity (auth failed,
> >> 2 attempts in 180 secs): user=<user at domain.com>, method=CRAM-MD5,
> >> rip=1:2:3:4::5, lip=1:2:3:6::7, TLS,
> >> session=<HZeFLGusb8IgAQZ8LNQAEgAAAAAAAAAC>
> >>
> >> Switching dovecot back to IPv4 only (listen = *) starts to work as
> >> expected. Roundcube seems to also have the same problem whenever dovecot
> >> IPv6 is enabled.
> > 
> > Are you intentionally using CRAM-MD5 to authenticate?
> 
> Yes, but I have already tried plain with same results.

Can you turn on 

auth_debug=yes

and see if that gives any further insight to this problem. I am using IPv6 myself with dovecot, so I doubt that's the problem.

Aki