In (e-mail address removed) <
[email protected]>
posted a question
Then Kevin replied below:
These to messages are totally unrelated and have nothing to do with each
other.
This is a non-delivery report from a mail server, this is what RFC 1893 says
about the error code:
X.4.0 Other or undefined network or routing status
Something went wrong with the networking, but it is not
clear what the problem is, or the problem cannot be well
expressed with any of the other provided detail codes.
If the email address in the NDR is the one you're trying to send to it does
not even have an authorised TLD, which may be the reson for the 5.4.0
Well, here's one that I'm getting from my goofed up DNS.
A non-delivery report with a status code of 5.4.0 was
generated for recipient rfc822;
[email protected]
(Message-ID <002a01c45ee9$e23c4c90
[email protected]>).
Causes: This message indicates a DNS problem or an IP
address configuration problem
Solution: Check the DNS using nslookup or dnsq. Verify
the IP address is in IPv4 literal format.
For more information, click
http://www.microsoft.com/contentredirect.asp.
And anotether.
This one is your server trying to register its addresses in the blackhole
DNS server, which is the subject of your original post. You are getting this
because you have either mis-confifured your reverse lookup zone for your
private subnet or it does not exist in the DNS server in TCP/IP properties.
Do you see the DNS/prisoner.iana.org. in the message?
If you had a reverse lookup zone it would not get to that DNS server,
prisoner.iana.org is the blackhole DNS server for private IP addresses.