10.0 system issuing outbound packets to port 25 smtp to 66.96.214.197

[Ernie Luzar]

My ipfilter firewall logs 2 outbound packets on port 25 every 70 
minuets.  There is no LAN behind this box is it must be coming from the
freebsd 10.0 system or from one of the official installed ports I have.
Sendmail is disabled and postfix is running in it's place.

66.96.214.197,25 tcp is the target public ip address.

How should I go about finding the running task that is doing this???