>8/19/98 10:47:15 PM (Internet Mail Gateway) Write msg to >joe@c586946-a.plstn1.sfba.home.com
Its sitting in the "Export" folder of something called "Internet Mail Gateway".
What ever that is, it seems unecessary. To gateway email to the internet, setup the SMTP Gateway, as you've done. Mark it the "default" gateway. Thats' it.
You'll probably want to upgrade to v5.6/5.7 once you get into this a little deeper too. Maybe use the v5.6 demo as a starting point instead of your 4 yr old version.