Check the send connector and make sure it is set up to use the same DNS
settings as your NIC, otherwise your nslookup check would give you different
results. You can set the connector to use DNS other than what the server's NIC
is set to use. Perhaps someone did that..
From: Steve Hart [mailto:sh...@wrightbg.com]
Sent: Friday, January 21, 2011 12:13 PM
To: MS-Exchange Admin Issues
Subject: DNS issue
Here's one that has me a bit baffled. Exchange 2007
We're cannot send email to one domain (lobassopackaging.com). Queue viewer is
showing them failing with 451 4.4.0 DNS query failed.
Nslookup (run on the Exchange server) resolves the mx record as
inbound.lobassopackaging.com.namesecuremail.net. That name resolves to
205.178.149.7 . I can telnet to port 25 on that server perfectly.
Ideas?
Steve
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