Capture all incoming/outgoing email messages

[Chuck Swiger]

On Oct 6, 2006, at 1:11 PM, Dominik Zalewski wrote:
> I just want to capture all smtp/pop3 traffic in packets level.

OK:

   tcpdump -w /var/log/mailarchive.dump -s 0 port smtp or port pop3

But be aware that you should disclose the existence of this mail  
monitoring to all users, consult your local laws about electronic  
wiretapping, or both.  In some countries or states, doing the above  
without notification and/or the permission of at least one party is  
likely to be against the law...

[ This probably belongs on freebsd-questions@, or in a discussion  
with your lawyer. ]

-- 
-Chuck