In follow up to my enquiry regarding the editing of contacts in the send to box--

Cesar & iFiredog responded

  The problem exists when  the- send to box -has a number of contacts listed, you send your message only to be advised shortly thereafter the message has not been sent due to an error in one or more of the contact addresses. you then try editing the incorrect address with out any success, it will not allow any changes to the original listings.Hope this outlines the problem sufficiently. Any cures available??