Security/Policy question

[Chris Trudeau]

This has likely already been discussed, but I can't quite piece together the
rules logic and MTA components required to actually do this...I'm thinking
its part of  "domain specific white/blacklisting" in the CustomerConfig.pm,
but I'm not sure.

Conside the following scenario:

I have a mailscanner system providing service for several domains as a
gateway.  I would like to block email originating from any location OTHER
than my assigned next hop mail gateways which has a sender address of that
protected domain.  See WEAK ASCII below:


example.com            MS
mail server             Gateway              Internet
   |                              |                            |
   -----------------------------------------

so any mail that comes from the Internet with a sender domain of example.com
should be blocked.

Any ideas  MTA is postfix.

CT