I get the error “Sending email failed due to the follwing error: One or more recipients are invalid.” Now I know why this. It is because I have sent an email with an invalid email address. But it is not in the outbox or the sent items. So I don’t know how to delete it. Can anyone help me track down how to delete it so I stop getting this error?
Right-click on Smart Folders and choose Outbox. You will find your message there.