Thanks to everyone who helped with my sendmail problem. I now have it working. Final configuration: in sendmail.cf: DS[10.128.96.34] DMsatellite.bigpond.com Under Cw I had to remove satellite.bigpond.com so it didn't consider it to be local and try to deliver to a local mail account. And then I had to get DNS working. Since the firewall already has a working DNS server on it, I edited /etc/resolv.conf to point to 10.128.96.34 instead of 0.0.0.0. (Whoever said Sendmail wouldn't work without DNS was correct - it won't even try to send the message if it can't do a DNS lookup.) Now the internal system can send mail to the outside world which appears to come from [user]@satellite.bigpond.com. -- _____________________________________________________________ Network Operations Engineer - Big Pond Advance Satellite Ericsson Australia - Level 5, 184 The Broadway, Sydney 2000 Ph: +61-416-085-390 Email: [EMAIL PROTECTED] -- SLUG - Sydney Linux User Group Mailing List - http://slug.org.au/ More Info: http://slug.org.au/lists/listinfo/slug