Whitelisting rule query

[Stef Morrell]

Hello,

I'm wanting to whitelist email coming from my office, so it doesn't get
marked up as spam, in particular when discussing spammy topics with
colleagues/clients. 

If I simply whitelist *@mydomain.com then this allows email with spoofed
'from' address throught.

I can't whitelist the mail relay, as there's any number of domains email
running through it and if one of those users takes it upon themselves to
throw a spam sandwich at it, I want to catch it and stop it before the
wide wide world decides to blacklist me.

So, what I hope to be able to do is add a spam whitelisting rule along
the lines of

From: *@mydomain and From: <IP ADDRESS>

Does this makes sense and is it achieveable?

Regards

Stef
--
Stefan Morrell          | Operations Director
Tel: 0845 3452820       | Alpha Omega Computers Ltd
Fax: 0845 3452830       | Incorporating Level 5 Internet
stef at aoc-uk.com         | stef at l5net.net