Remember the purpose of the e-mail.. Did you really think it would stop him?? Maybe..Maybe not.. but, now you have also started a trail showing that he is acting without your blessing in ways that are not in the best interest of your children. Personally.. I don't think he even deserved a response.
And, yes, he is a jerk.. I've heard very close to the same excuses/jusifications.. Scary actually - they must've gotten those lines out of the "What to say to your spouse when you are having an affair" book.
