Script running for every mail given to qmail-smtp

[LonelyStar]

Hi,

I have a vServer with qmail and an ldap-addressbook on it.
I am sending mail over the qmail-smtp client.
I would like to automaticly add addresses from mails I am sending.

So is it possible to run a script whenever a mail is passed to qmail-smtp which can get the following information:

- If the sender authenticated (so that I know if I send the mail or if I am receiving a mail).
- The recipients address and name.

Can this be done?
Thanks!
Nathan