I've had a few people report that they send messages using our Exchange server and the recipient never receives it. Here's what I know:
- The message does appear in the "Sent Items" folder of the sender, so they're not stuck in the Outbox.
- The message is not found in the Message Journal.
- The message is no where to be found in searches of the Delivery Reports using the EAC.
- The message can either be on our Exchange server (completely internal), between us and a sister Exchange server (different forest) or sent to an SMTP address outside of our company.
- Not all messages fail--only some of them.
- The failures seem to come in batches instead of a random single message here and there. It's more like 7 messages in a row are lost and then it starts working again.
We're a single server Exchange 2013 environment (CU3). Yes, we're behind on patches. Next maintenance window...
Does this sound at all familiar? If this is a known bug, I want to be sure it's fixed in the CU level that I move to.
Thanks!
Patrick