I have an Exchange 5.5 SP4 Server. I am getting the following messages in the admin mailbox (hundreds a day):
Outbound Mail Failure
The following recipients did not receive the attached mail. Reasons are listed with each recipient:
MSEXCH:IMS:XXXXXX:DDDD:CHCNT05 0x80040C02 (00050311) Maximum receipt headers exceeded (possible mail loop).
The message that caused this notification was: All email is addressed to addresses that are no longer in the GAL.
Eventually the NDR is returned but that takes days sometimes. The event logs show Evevt ID of 4098 and 12071 max hop count exceeded.
I've checked everything and can't figure it out. Any suggestions?
If it only happens when you SEND messages the two most likely things are either DNS has been changed, or you've changed the method used to deliver mail. Perhaps it was "Forward all..." and now it's "Use domain name system (DNS)" (or vice-versa).
This behavior occurs because Internet Mail Service is connecting to itself in an attempt to deliver the message. One of the following should resolve this for you:
Hope this helps.
Dig Deeper on Legacy Exchange Server versions
Related Q&A from SearchExchange Staff
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.