Zion Ahead

Well-Known Member
Nov 10, 2006
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

[email protected]
SMTP error from remote mail server after end of data:
host mailin-02.mx.aol.com []: 421-:
(DNS:NR) http://postmaster.info.aol.com/errors/421dnsnr.html
421 SERVICE NOT AVAILABLE: retry timeout exceeded

My customer's domain does have a reverse dns record setup, over 2 days now.

Why else would she continue to get this error?


Jun 24, 2005
Reverse DNS usually cannot be setup within your server but rather instead
within the DNS system of your server provider.

I have never known a server provider to charge for reverse DNS so all
you should have to do is simply contact your provider and tell them
what hostname you would like resolved for the IP.

(AOL won't care what the reverse hostname is but rather that it just exists)

To find out what hostname you have currently, you can use the reverse
lookup tools at http://www.dnsstuff.com

To find who controls the IP (and thus where the reverse PTR needs to setup),
you can lookup the IP number on the WHOIS lookup at http://www.arin.net