It's very important that you blow this off and do not reply. Make him understand that you are not uninterested, so interested that you will not even reply. I wouldn't even check his emails anymore if they effect you this way.

The words of an abusive man, even visually, attempting to con his way back into your life can have very strong affects. It's just another way to gain control over you.

I hope you stay away from him.....good luck