Event ID - 9004

Event Id9004
DescriptionCategorizer encountered a hard error while processing a message.
While processing User smtp:user@example.com, the function CPhatCat::HrIsRecipientInSameRG
called MDAGetInfo which returned error code 0x80040920 (). A DSN has been generated.

0000: 20 09 04 80
Event InformationThe following microsoft article will give more information about this event.
Reference LinksMessage Flow Stops Between Servers and Event ID 9004 Appears in the Application Log

Mail Delivery Is Significantly Delayed, and Event ID 9004 Appears in the Application Log

Event 9004 with Error Code 0x8007054b Occurs When Processing Inbound Mail

Messages remain in the "Messages awaiting directory lookup" SMTP queue in Exchange Server 2003 or in Exchange 2000 Server

Unable to Receive External Mail

NDR for X.400 One-Off Address That Contains a Slash Mark

Catch threats immediately

We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.

See what we caught

Did this information help you to resolve the problem?

Yes: My problem was resolved.
No: The information was not helpful / Partially helpful.