* li...@lazygranch.com <li...@lazygranch.com>:

> This is probably more of a freebsd question, but it seems to me that Postfix 
> should be hogging (bound) to the mail ports, so if something is sending 
> email, it has to be using Postfix.

No. Sending can be done by other processes as well, since it doesn't
require binding to port 25, but connecting to port 25.
 
> I ‎suppose modifying IPFW to log all mail port activity is also a good idea.

Yes. Ports 25, 143, 110 and the encyrpted equivalents.
 
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