Using your @pornrex.com domain is the correct thing to use. In fact you should always use a domain that you own and not your ISP's e-mail. This way if you change ISPs it doesn't affect your business.
The rogers thing has nothing to do with you. It is because of all the spamming cheating low life fucks that seem to love using that ISP's e-mail service. I got so sick of it that I did a wildcard ban of their e-mail.
