Can't reply to or fwd from a specific recipient

[Jephph]

I am totally stumped on this one. I'm using Outlook 2003 SP2 in an exchange envirmonment. When I receive a message from one particular user (john.doe@abc.com) who is also has a mailbox on the same Exchange server, I am unable to either reply to john.doc@abc.com or forward the message to another recipient (internal or external.
In both cases, the message just stays in the Outbox. I've tried to access the Outbox and Send/Receive, but to no avail. The message will stay there forever, until I manaully delete it.
I am able to originate a new message to john.doe@abc.com -- no problem. This is driving us NUTS! Any ideas out there in smart-people land?

 

[Zelandakh]

Outlook /resetfolders
If that fails, delete the Outlook profile and recreate.

Anything in the event log on the client?

 

[smah]

A corrupt nickname cache is the likely cause.

http://support.microsoft.com/kb/287623/en-us

 

[Zelandakh]

Good call - yes. I agree with smah. Delete the outlook.nk2 file.