Brent called last week about setting up a mail server and it was true that his ISP was blocking port 25 for that purpose. So what does he do with using his own domain name? Leo says that he has his own domain name at leoville.com and he doesn't run a mail server. He just runs Leoville.com through GMail.
Brent should figure out where his domain name is hosted. In the domain name settings, he can add an MX record, which will tell the domain to bounce his email to GMail. It'll automatically route the emails to his GMail account.