I had a coworker who was getting the same strange ocurrence on Outlook 2000.
However, our admins were in the middle of switching servers, and her profile
didn't carry over, for some reason. Plus, her account options weren't
properly configured (i.e. "Account disabled" checked, couldn't change
password, etc.) I don't if they rebuilt her Exchange account or what, but I
haven't heard of any more troubles...(okay, I know this doesn't sound very
helpful, but...)

" wrote:

I am rebuilding from a crash which mostly affected Outlook 2003. I
have replaced some .dll's involving MAPI, and almost have it working
'normally', except when I try to send messages. If I send to someone
in my address book that Outlook recognizes, it adds '=smtp: to the
address '), and it sits in the outbox. If I
re-open the outbox message and delete the '=smtp: (and the trailing ' )
in the address, then it replys 'Outlook does not recognize one or more
names'. Same thing happens if I enter a valid address that isn't
already in my address book. If I retype the name so that Outlook
recognises the name, then it appends the '=smtp: back onto the front of
the address, and it continues to sit.