Exchange 2010 all messages getting stuck in queue with error 400 4.4.7

We had some power issues yesterday and while that normally wouldn't be an issue we are in the middle of changing our UPS equipment out. Needless to say servers we not powered down in a clean way. The exchange server came back up with the error that it had lost its trust relationship with the domain. I removed it from the domain and rejoined and that seems to bring email back up online.

Now this morning I am seeing that all of the outgoing messages to external domains are getting caught with the error above. Nothing has changed but i have a feeling it has to do with out send connector but I am not seeing any issues with it. Any help would be much appreciated.
Chris ChristensenNetwork AdministratorAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

R--RCommented:
Can you check the event viewer for error events. Is you outbound email going through smarthost or DNS.
Please check internal emails.
Can you check your gateway/firewall is operational.
Run telnet mx1.hotmail.com 25 and check if you are able connect.
Also check if 25 port is open at firewall and ISP end.
0
Chris ChristensenNetwork AdministratorAuthor Commented:
Unable to telnet out, and email going through smarthost. I checked the outbound firewall rules and there is a rule allowing outbound 25 from internal to Any.

As far as event viewer goes, which logs should i be checking?
0
Chris ChristensenNetwork AdministratorAuthor Commented:
I am also getting this error every once in a while.

the remote pipeline has been stopped. it was running the command....
0
Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

Chris ChristensenNetwork AdministratorAuthor Commented:
Running mail flow analyzer got me a piece of info.

Invalid InternalDNSAdapterGuid setting found.
0
Simon Butler (Sembee)ConsultantCommented:
Have you set DNS servers on the Send Connector? If so, remove it and restart Transport.

Simon.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Chris ChristensenNetwork AdministratorAuthor Commented:
Send connector some how was as singed to a nic that did not exist.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.