When sending an e-mail the e-mail is in deed sent BUT an error message appears
"Some errore occured while processing the requested task".

There are no errors listed and the sent e-mail then remains in the outbox
rather then moving to the sent folder as set up to do.

So, the next time I send an e-mail the previous one is sent again as well as
the new one again producing the error message and more e-mails in the outbox.

Any ideas ?