Event ID - 6004

Event Id6004
DescriptionThe categorizer is unable to categorize messages due to a retryable error. A retryable categorizer error occurred.
Event InformationAccording to Microsoft:
This issue can occur if a front-end server that is running Exchange 2000 has an SMTP Connector installed, but the information store is not running.
To resolve this issue, start the information store on the server, then create a mailbox store and mount it. To work around this issue, install the SMTP Connector on the back-end server instead.
Reference LinksXADM: NDRs and Delivery Receipts Are Not Sent

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

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.