Sending mail to this list

[Paul D. Lathrop]

I was attempting to send a different question to this list, when I ran 
smack dab into a more pressing problem. When I sent the mail, it never 
reached the list. Further investigation found this message in my mail 
logs:

Mar 16 22:10:32 rackspace postfix/smtp[28417]: 8B00131673: 
to=<[EMAIL PROTECTED]>, relay=mx1.freebsd.org[216.136.204.125], 
delay=11, status=deferred (host mx1.freebsd.org[216.136.204.125] said: 
450 Client host rejected: cannot find your hostname, [65.61.155.146] 
(in reply to RCPT TO command))

What exactly does this mean, and how can I fix it? I don't want my mail 
server to be crippled in this manner.

Thanks,
Paul D. Lathrop (usually [EMAIL PROTECTED])
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