How to disable spam checking of messages from internal network

[PNE]

I know that I had asked this on forums before, but since I got no reply that would help me I am asking again after some time. Is there a way to disable spam filtering for all messages that come from my internal networks and/or from authenticated SMTP users? Time from time a couple of outgoing messages gets lost being incorrectly marked as spam. And more, why to increase CPU utilization for this?

Thanks, Petr

[phoenix]

If you don't wnat to check certain mail/domains then just add the to a whitelist, search the wiki for 'whitelist' - it's also been covered once or twice in the forums.

[PNE]

Thanks Phoenix. But I did not ask for domain/user whitelisting, sender address is very often forged. I have seen numerous examples of spam coming to us from our own domain (forged) and such an approach would be contraproductive.

For the start, I would be happy if I could disable spam checking when message arrives from our internal network.