IPv6 auth failed

[Aki Tuomi]

> 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?

Aki