Try port 587. relayhost=smtp.comcast.net:587 Put that as your relayhost in /etc/postfix/main.cf. Hth, Garrett chomiak7737 at att.net wrote: > Hi all. > > I got my friend set up with Comcast cable; the only snag was that after > the technician left attempts to use the internet solicited "forbidden" and > I had to call and get them to actually activate the modem which they of > course did very easily remotely. But the email is driving me crazy!!! I'm > having no problem setting up fetchmail for her to receive email but I > can't seem to get sending email right for her. Happen to be using postfix > but would be perfectly happy to use ssmtp or whatever other package for > which somebody can give me configuration tips. I keep getting an error > about: > host or domain name not found. Name service error for > name=smtp.comcast.net. type =A: host not found; try again. but when I > googled it seemed to indicate that the servers are mail.comcast.net for > retrieving--which is working and smtp.comcast.net for sending--which is > not working. When I tried telneting I say smtp.g.comcast.net but > trying this got me the same results as above--grrrrrrr!!! > Also, do I need > to use port 465 or not? > > Tia. > >