I havent tried it but may be you can try AuthInfo but with little bit
of hacking.
You need to change ruleset to check user@domain instead of just domain.
You will also need passwords of each user.
But if you have static public IP you dont need smart host anyway.
Thanks, I will try Authinfo.
--
Warm Regards
~~~~~~~~~~~~~~~
Vinayak
http://theregoesanotherday.blogspot.com/
--------------------------------------------------------------------------------
If you aim to fly, then don't hang around with chickens.
Why? Because chickens can't fly.
---------------------------------------------------------------------------------