On 9/8/2020 9:51, Aki Tuomi wrote:

On 09/08/2020 09:15 Lefteris Tsintjelis <[email protected]> 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=<[email protected]>, 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.

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