I have a dovecot server running on an Ubuntu 14.04 server, which reads the login-data (user/domain/password) from a mysql-database.
The passwords are saved as salted SHA256 hashes. To generate these, I use the command
doveadm pw -s SHA512-CRYPT. According to Dovecot wiki Authentication PasswordSchemes page, the command uses glibcs
Now, when I use a password without special characters (Uppercase/Lowercase letters and numbers) like "t3st", I can successfully login to the according mail-account. But as soon as the password contains any other characters (e.g.
t3$t), I can't login anymore. doveadm will in both cases return seemingly valid hashes (e.g.
I tried logging in to the server via Thunderbird and an web-based mail-interface, with both giving the same error-message in the log-files:
dovecot: imap-login: Disconnected (auth failed, 1 attempts in 2 secs) ...
I also tried using the MD5-CRYPT "encryption", with the same results.