Re: Error sending mail if MX record is "." example is hotmil.com

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According to RFC 1183 Section 2.2, "." is a legal value for "This domain
does not receive mails."

....The root domain name (just ".") may be specified for <mbox-dname> to
indicate that no mailbox is available....


<9146fan@xxxxxxxxx>
???????:1140054701.195580.254950@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I have a strange problem. Running Win2k3 domain and all win2k3 servers.

I have an email that is trying to be sent to user@xxxxxxxxxxx (yes that
is misspelled).

My IIS6 SMTP server tries to deliver this to my Domain Controller for
some reason. (they are on different servers.) I don't have SMTP server
on the Domain Controller.

The MX record for "hotmil.com" is set to "." (meaning "root" I believe)
with a Preference of 0.


First off, this domain's MX record is probably incorrect. However, why
would IIS6 SMTP and thus the underlying MS DNS resolve this back to my
domain controller?


Seems like a way that bad guys could cause mail servers loop all over
themselves.


Here is an NSLOOKUP for the "hotmil.com" domain.

server ns45.worldnic.com
Default Server: ns45.worldnic.com
Address: 216.168.228.25

set query=mx
hotmil.com
Server: ns45.worldnic.com
Address: 216.168.228.25

(root) nameserver = D.ROOT-SERVERS.NET
(root) nameserver = E.ROOT-SERVERS.NET
(root) nameserver = F.ROOT-SERVERS.NET
(root) nameserver = G.ROOT-SERVERS.NET
(root) nameserver = H.ROOT-SERVERS.NET
(root) nameserver = I.ROOT-SERVERS.NET
(root) nameserver = J.ROOT-SERVERS.NET
(root) nameserver = K.ROOT-SERVERS.NET
(root) nameserver = L.ROOT-SERVERS.NET
(root) nameserver = M.ROOT-SERVERS.NET
(root) nameserver = A.ROOT-SERVERS.NET
(root) nameserver = B.ROOT-SERVERS.NET
(root) nameserver = C.ROOT-SERVERS.NET




.

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