[Dovecot] Last login tracking with login_executable

Hi,

I'm using Dovecot 1.2.14, and I've read PostLoginScripting on the wiki.

Is there any way to make Dovecot use the same username/password for database access as userdb and passdb queries? Specifying the password with -p doesn't seem like a good idea, so I'm wondering if it can be handled by Dovecot directly.

Or is it possible to track last logins with a plugin similar to quota?

-- Denny Lin