Try this Microsoft fix:

http://support.microsoft.com/default.aspx/kb/941090
"Messages may be stuck in the Outbox when you use Windows Mail on a computer
that is running Windows Vista"

It works on other folders in addition to the Outbox.

Hal

--
Hal Hostetler, CPBE -- hhh@kvoa.com
Senior Engineer/MIS -- MS MVP-Print/Imaging -- WA7BGX
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"WILHO" <WILHO@discussions.microsoft.com> wrote in message
news:412A74BA-5CC8-4C54-B81A-C477EDCD5DD6@microsoft.com...
> I have just got similar experience in the last few days! One mail stuck to
> the OUT box, but could not be sent out and could not be deleted by any
means.
> Anyhow the mail receiving function is running well.
>
> Can Microsoft help to provide any solution?
>
> "elores waterman" wrote:
>
> > I recently downloaded the micosoft update to get emial that were stuck
in
> > windows mail that I could not delete, that process went well. how ever
since
> > that process i cannot send or recieve emails . My service is asking for
> > authorization whwn I enter my user name and password I get this error
> > Account: 'mail.suntwist.com', Server: 'mail.suntwist.com', Protocol:
POP3,
> > Server Response: '-ERR Login failed.', Port: 110, Secure(SSL): No,
Server
> > Error: 0x800CCC90, Error Number: 0x800CCC92
> > I have not changed any of my information in my account. what is
happening?
> >
> >
> >
> >
> >
> >
> > --
> > dwaterman