Post-login scripting

[Gedalya]

I use an access policy server which mostly does rate-limiting and also 
writes to a database.
It's written in perl.
If all you want to do is to write some records for every connection then 
the script would be rather simple.
You just need to put "check_policy_service unix:...." in the right 
place, presumably in smtpd_client_restrictions, I guess if you put it 
before permit_sasl_authenticated it would still have the auth details, 
due to delayed evaluation.