[SGVLUG] Postfix Rejections

[Solomon K. Chang]

Hola, SGV cronies,

I've been trying to get a Postfix installation running for some time now.  I have a stock CentOS installation.

However, when I try to send mail to my domain, the mail keeps getting bounced.  A brief glance at /var/log/maillog show me:

Mar 18 15:09:13 localhost postfix/smtpd[32333]: NOQUEUE: reject: RCPT from n56.bullet.mail.sp1.yahoo.com[98.136.44.52]: 554 5.7.1 <admin at XXXXXX.TLD>: Relay access denied; from=<solomonchasos at yahoo.com> to=<admin at XXXXXX.TLD> proto=SMTP helo=<n56.bullet.mail.sp1.yahoo.com>

[domains x'd out for security reasons]

I've done the following:
- made sure port 25 is wide open.
- added "admin at XXXXXX.TLD OK" to /etc/postfix/relay_recipients
- added "yahoo.com OK" to /etc/postfix/access
- added ".yahoo.com OK" to /etc/postfix/access
- ran postmap against /etc/postfix/access and /etc/postfix/relay_recipients
- restart Postfix

...and the mail server is still rejecting Yahoo, just like that hot supermodel at the bar last night-... but that's another story for another time.  Ironically, I can send email connecting from another machine on the local subnet.

What have I left out?

Thanks in advance.

Solomon