I Need help

I am trying to setup a e-mail gateway server, and planning to place it
on the firewall-DMZ port with Postfix+Amavisd-new+ClamAV+MySQL+Apache2
on a SuSE-10.1_x86_64 box.

It should work with my existing e-mail server (Inside Firewall)
running on RHEL-3.0_x86_64 box.

The purpose of server is to act as a MX (accepting emails from
external email server of a any domains) that coming to our domain,
thus any e-mail that arrive to our domain should be first scanned for
SPAM/Virus, later based on the Policy it should be delivered to
internal e-mail server which as user-mail account and mail-storage.

I need help

Regards,
Thomas