We're running Exchange 2010 on Server 2008 R2. All updates are installed.
We have a domain that cannot send us mail. They do not receive a bounce back email.
Running get-messagetrackinglog -sender "sender@problemdomain.com"
reveals a list of messages with the EventID of "FAIL"
If I look at a specific message with running get-messagetrackinglog -sender "sender@problemdomain.com" -messagesubject "Test" | fl
, I see that the RecipientStatus says
{250 2.6.0 Queued mail for deliver}
Note that this happens whether a real message is sent, or if I telnet locally on the Exchange computer using 127.0.0.1:25 and send a test message from that domain.
I have added the domain, and specific user to the BypassSenders/ByPassSenderDomains, but no avail.
We are running MS Security Essentials for AV, and once had SpamFighter Exchange module installed, but no longer.
Your help is much appreciated!