Remarkably that was their response to our question.  We have found an answer  Thanks for your assistance.  It was as suggested the settings.  The Host SMTP were fine.  It was the spam settings on a host relay for the SMTP.  Once the spam filter was updated the forum email notification worked perfectly.  We do want to change the wordage within the email.  Is the forumemail.xml used for both post and edit notifications?   In particular we're trying to locate one phrase "was edited by {Users Name} into forum"  Any suggestions would be appreciated