[Dovecot] Failed IMAP Login Attempts in Logs

[Jim Pazarena]

On Tue, 5 Jan 2010 11:09:07 -0500, Carlos Williams <carloswill at gmail.com>
wrote:
> I had a user telling me that they can't login to the Postfix email
> server via Webmail (RoundCube) and I decided to see if I could locate
> this issue in the logs and understand if the user was simply using a
> wrong password credential and or something more serious. More than
> likely the person is just using a wrong password but in search of this
> on my logs, I don't understand why Dovecot doesn't log failed login
> attempts.
> 
> Is there a log level or something I am not searching for that will
> allow me to see failed or invalid logins for Dovecot (IMAP)?

# In case of password mismatches, log the passwords and used scheme so the
# problem can be debugged. Enabling this also enables auth_debug.
#auth_debug_passwords = no
auth_debug_passwords = yes