From: Charles Todd (no email)
Date: Mon May 16 2005 - 15:04:00 EDT
Hello,
I cannot figure out if this is even possible after many hours of
research. I am currently moving our email and web hosting to a dedicated
server. Here is what I would like it to do, and if anyone can point me
in the direction of the right how-to / man page I would be much obliged.
I have single server with a single IP address.
that will:
host our primary email boxes (princetonsearch.com)
be able to forward messages from our 20 + old domains to
princetonsearch.com domain.
These I know how to do, here is where it gets beyond me.
We are using message labs for our email filtering, princetonsearch.com's
MX record is set to message labs, however I need a way to
a) forward messages from to
with it going through the message labs
filter. To get message labs to take it correctly, the message has to
appear to be for when it gets there.
b) I use SMTP auth to make sure users are allowed to relay messages, I
need a way to set postfix so unless a connection is using a valid SMTP
auth user or message labs, it drops the message, basically I need to
protect my users from direct IP spamming / viruses.
One idea I had was to somehow check the headers of all messages, and if
they haven't been touched by message labs to send them to message labs
so they can filter then send them back to us. However that opens us up
to spoofed header attacked (and I don't have a clue how to setup that
sort of filter)
Thanks
Charles
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