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 --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
