While I see why you don't want to change your email, you are able to block individual users. The idiot your ex married is getting her jollies by abusing you through email. Just block her and move on.
Also, my ex is supposed to get my COBRA payment to me on the 1st of each month, but he sends it 3, 4, now up to 5 days late. Why? Beats me. But if I were to guess, it is a control thing. And if he thinks I will send an email complaining about it, he is sadly mistaken.
