I have had an Exchange box up and running w/ no issues for a few weeks. Today, I get all mail sent to any Custom Recipient (all addressed to the same domain) bouncing back w/ the undeliverable message. Testing mail to and from the internet works with that domain, and I can receive mail from them, but not send. All other mail is still working.
error reported:
Your message did not reach some or all of the intended recipients.
Subject: test3
Sent: 2/19/2003 11:03 AM
The following recipient(s) could not be reached:
User Username on 2/19/2003 11:03 AM
Unable to deliver the message due to a communications failure
The MTS-ID of the original message is: c=US;a= ;p=CompanyX;l=ExchangeServerName-030219160309Z-4379
MSEXCH:IMS:CompanyX
HL:ExchangeServerName 3902 (000B09AA) Host Unknown
error reported:
Your message did not reach some or all of the intended recipients.
Subject: test3
Sent: 2/19/2003 11:03 AM
The following recipient(s) could not be reached:
User Username on 2/19/2003 11:03 AM
Unable to deliver the message due to a communications failure
The MTS-ID of the original message is: c=US;a= ;p=CompanyX;l=ExchangeServerName-030219160309Z-4379
MSEXCH:IMS:CompanyX
HL:ExchangeServerName 3902 (000B09AA) Host Unknown