Not sure we're on the same page. The script was on my server (not a GoDaddy server). It was sending to any email address just fine, except the GoDaddy email address. We tried sending it to 3 email addresses at the same time and 2 of the emails would be delevered but never the one addressed to the account on the GoDaddy server.
If the GoDaddy server doesn't deliver a standard email, I would expect it to send I bounce message.