In that case, try this Microsoft fix:
http://support.microsoft.com/kb/941090
--
Gary VanderMolen, MS-MVP (Mail)
"Karen" <> wrote in message news:2D6E8ED8-5127-4351-BB30-...
> Sorry, I meant my outbox not outlook. I am using Windows Vista.
>
> Karen
>
> "Gary VanderMolen" wrote:
>
>> Outlook? We don't normally support Outlook issues in this newsgroup.
>> Try microsoft.public.outlook.general.
>>
>> --
>> Gary VanderMolen, MS-MVP (Mail)
>>
>>
>> "Karen" <> wrote in message news:008FCC4F-4438-47E8-B1CF-...
>> >I can receive but not send email. The first message in outlook not to be
>> > sent has been replaced by an "unknown error" mail message. I'm unable to
>> > delete or move this message. Any ideas?
>>