problem with postfix rejecting email

[Bill Tangren]

I'm having a problem with postfix, version 2.2.10-1.1.el4. Because of the
screwy firewall configuration here, some lcoal email comes in to my email
server with no reverse DNS entry. I had been rejecting those, but now that
some of our own email is coming in that way, I need to turn it off. I
thought I had been using reject_unknown_sender_domain to reject such
email, but when I comment it out, I'm still rejecting email with no
reverse DNS entry.

My question: How do I turn this feature off?

This is an example of a rejection in the log:

Dec  4 10:49:47 aa postfix/smtpd[19280]: NOQUEUE: reject: RCPT from
unknown[x.x.x.x]: 450 Client host rejected: cannot find your hostname,
[x.x.x.x]; from=<emailaddy> to=<localuser> proto=ESMTP helo=<sender>



-- 
Bill Tangren
U.S. Naval Observatory