IPv6 auth failed

[Lefteris Tsintjelis]

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.