[Dovecot] Authentication cache, failure to login after changed password

Hi,

I have an issue with the authentication cache.

When a user changes his password, the cache doesn't seem to get flushed. Meaning the user is unable to log in to his IMAP account after changing his password.

Flow:

• Log into IMAP account using pass1
  • Approved
    • Stored in auth cache
• Change password to pass2 in MySQL
• Log into IMAP account using pass2
  • Access is denied
• Restart dovecot
• Log into IMAP account using pass2
  • Approved

I'd really like to continue to use the auth cache, is there any solution to the above? perhaps a way to debug the cache and auth process? I wasn't able to activate auth_debug without restarting Dovecot and solving the problem.

Using version 1.1.1, MySQL userdb, with "nopassword=Y".

Maybe it's due to nopassword?

Thanks

Tom