For the past year I just left your settings set as they were with no problem. Since the problem came up I have tried several server settings including the one you just recommended but still no success. Godaddy's support didn't help much, all they did was recommend using their own email form which I do not like at all. They didn't really explain what they changed but that they did make a change recently. I have tried other Email Form scripts that were totally different which were working earlier for years and now they don't work either. I submitted a trouble ticket to Godaddy but haven't heard from them.
*Where do you change the port number in Universal Mail, I can't find it.