Hey, Ok - long story short, I'm a small web designer, and I end up hosting most of my clients sites on my Fedora 6 server, running ISPConfig and Postfix. Right now, if they need email, I just sign them up with google's apps for your domain service, which provides free email domain hosting. Works great, until now... I have two clients; one wants a PHPbb forum, and the other wants Zen cart. Both *need* emails to be able to be sent from the website via PHP scripts. I want to be able to use their domain name, (i.e. [email protected], instead of [email protected]). Simple - just use Postfix. Well, I have another problem. I'm on a Bellsouth DSL connection, with port 25 blocked. I've talked with them, and threatened to leave, and they won't unblock port 25. Supposedly, I can authenticate all my outgoing mail through my ISP's email servers, because my gmail account can send outgoing just fine. So, connecting the dots, you'd think I would be able to send my domain.com email through their mailservers, right? People have told me I can... Could anybody do me a BIG favor, and let me know how to do this, or link me to some tutorials? I'll make a fresh install of any distro you want, and install whatever packages, and follow any directions. I have a spare server to use. I don't care if its postfix or sendmail at this point - I just want something to work, so I can see that it does work and how it does work. FYI: ISP is bellsouth, so mailservers are mail.bellsouth.net. Thank you very very very much for any replies!