Hasn't that been answered at least a dozen times before, with this:
http://support.microsoft.com/default.aspx/kb/941090
Although it's labelled as for mail stuck in the Outbox, it also works in
other folders.
"aq2wsde3" <aq2wsde3@discussions.microsoft.com> wrote in message
news:41066A6C-BE4E-465C-B11C-B2D7569BB3CB@microsoft.com...
>
>
> "Cheryl of Exeter, NH" wrote:
>
>> Keep getting 'Unknown error has occurred' when try to delete messages out
>> of
>> deleted box. I already deleted the mail that I could delete individually.
>> Now
>> I'm left with a bunch of deleted mail that can't be permanently deleted.
>> HELP!
>> Thanks,
>> Cheryl