Am 23.07.2017 um 17:50 schrieb david.madman2@vfemail.net:
My /var/log/mail.log shows:
Jul 22 18:40:48 www dovecot: auth: Error: passwd-file(test@domain.com,46.xxx.xxx.xxx,<wZoHUuxU6IAu9j4y>): Password data is not valid for scheme SHA256: Input length isn't valid (0 instead of 32) Jul 22 18:41:00 www dovecot: message repeated 2 times: [ auth: Error: passwd-file(test@domain.com,46.xxx.xxx.xxx,<fGoHUuxU6IAu9j4y>): Password data is not valid for scheme SHA256: Input length isn't valid (0 instead of 32)] Jul 22 18:41:02 www dovecot: imap-login: Disconnected (auth failed, 3 attempts in 14 secs): user=<test@domain.com>, method=PLAIN, rip=46.xxx.xxx.xxx, lip=139.xxx.xxx.xxx, TLS, session=<fGoHUuxU6IAu9j4y>
What does "Password data is not valid for scheme SHA256: Input length isn't valid (0 instead of 32)]" mean? I assume that there is some kind of a mismatch between the way I generated the password with doveadm and entered it in passwd.db and the way I entered the non-hashed password into the password field in the new account section of Thunderbird.
It means that dovecot expacts to verify a 32 byte long password hash. What it detects has a size of 0 byte. You haven't shown an example line of your passwd.db file, but I would guess you build it up not correct.
See
https://wiki.dovecot.org/Authentication/PasswordSchemes
Alexander