It works! The trick here is that you need to specify your own smtp server but specify "smtp.gmail.com" anyway and for the user name, use the full address: usern

It works! The trick here is that you need to specify your own smtp server but specify "smtp.gmail.com" anyway and for the user name, use the full address: username@yourdomain.com - also, make sure to use SSL. Just tested, works like a charm.