Hi, So, I have my own ISPConfig server running postfix on Fedora 6, on a static IP address with bellsouth. They told me they would unblock port 25... so much for that. Now my mom wants to open a zen cart based shop on my server, but it needs to be able to send out emails to customers, confirming orders, etc. So... I was reading around, and saw this here: http://andrew.jorgensenfamily.us/2007/04/postfix-client-authentication/ Sounds like I can authenticate through mail.bellsouth.net using my bellsouth.net ID. I followed the steps, and have made sure these lines are in the main.cf file: relayhost = mail.bellsouth.net smtp_sasl_auth_enable = yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd and then also made the sasl_passwd file, with this inside it: mail.bellsouth.net usernameassword and then ran the "postmap /etc/postfix/sasl_passwd" command, and restarted my mail server. When trying to send mail, I get this bounce back immediately: ------------------- This is the mail system at host localhost.localdomain. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to <postmaster> If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <[user]@gmail.com>: host mx01.mail.bellsouth.net[18.104.22.168] said: 550 relaying mail to gmail.com is not allowed (in reply to RCPT TO command) Reporting-MTA: dns; localhost.localdomain X-Postfix-Queue-ID: 2F5C114C829A X-Postfix-Sender: rfc822; [email protected][domain].com Arrival-Date: Tue, 8 May 2007 18:38:37 -0400 (EDT) Final-Recipient: rfc822; [user]@gmail.com Original-Recipient: rfc822;[user]@gmail.com Action: failed Status: 5.0.0 Remote-MTA: dns; mx01.mail.bellsouth.net Diagnostic-Code: smtp; 550 relaying mail to gmail.com is not allowed ------------------------------- I'm assuming that is a problem with bellsouth, most likely them rejecting my connection? -- Other information that might be helpful -- My BIND DNS server is not working for some reason I do have the mailboxes setup correctly, using RoundCube I cannot receive email either This same setup (without the relayhost stuff, just a plain postfix install) worked when I was on Earthlink DSL. However, I left them to get a static IP with bellsouth. Any help is greatly appreciated! I'll keep playing around with this... hopefully I'll come across something.