On January 14, 2002 09:48 am, you wrote:
>
> One thing though: Where exactly is this filtering performed in postfix?

The general method is to have postfix feed the messages to the virus scanner,
which then sends them back to postfix on a new port, and configure postfix to
listen to that port in such a way that it doesn't send the message to the
virus scanner.

This is obliquely referenced in the Postfix FAQ at:
http://www.postfix.org/faq.html#scanning

The example there only touches on getting the information to the scanner.
The Amavis documentation is a decent starting point, but in short:

Added to master.cf:
vscan unix - n n - 10 pipe user=vscan
argv=/usr/sbin/amavis ${sender} ${recipient}
localhost:10025 inet n - n - - smtpd -o
content_filter=

That defines the vscan transport, which the first postfix sends the mail to.
The second line creates the scanless transport for delivery.

Added to main.cf:
content_filter = vscan:

That tells postfix to send mail to vscan by default.

Hope that helps.

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