[Mimedefang] Filtering Incomming Mail Only But...

Kelson kelson at speed.net
Wed May 21 12:48:48 EDT 2008

Steffen Kaiser wrote:
> You have to think up a way to detect, whether or not the mail is 
> "incoming" or "outgoing".

Following up on that, some examples of criteria you could use:

- Source IP address -- is it internal or external?
- Did the sender authenticate using SMTP-AUTH?

Kelson Vibber
SpeedGate Communications <www.speed.net>

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