[CentOS] How to add ClamAV to Postfix?

Sat Mar 21 17:37:30 UTC 2009
Xn Nooby <xnooby at gmail.com>

I sent this email to the Rehdat list, but I thought the Centos users
might be more inclined to have the command-line solution I am looking
for, so I thought I would post it here too:

I would like to add anti-virus to my email server. Currently I have
Postfix, Dovecot, PHP, and Squirrelmail installed.  The users only use
Squirrelmail to access mail. I am looking for command-line
instructions, since I have limited access to the server itself (I am
using SSH). ClamAV seems to be most common linux AV package, so I
assume I should be using that.

I'm not sure if I should be using Amavisd or MailScanner, or neither.
I believe I need one of them to act as the glue that connects Postfix
to ClamAV. Apparently none of these packages
(Amavisd/MailScanner/ClamAV) are part of RHEL5, so I have to get the
RPMS from somewhere else.

Is there some standard way of adding AV to Postfix?