You must have been a very special person to him if he is still contacting you at this point.
If I had been a special person to him this is how the email would have read: "Dear HotnCold, I have been thinking about you recently. You were special to me and I am saddened that we have lost touch... "
I know what vulnerability, tenderness, love and kindness look like now. They do not look like his aloof random emails out of nowhere that say nothing about him or his motivation to contact me whatsoever.
I believe that his latest relationship recently fell apart and he may be looking for someone who will take his abuse, and he thinks I am such a person. I was discussing this with a friend recently, because I find it incredibly out of touch on his part that he would think that this kind of email could ever elicit a response from someone that he once had a very serious relationship with.
I imagine that he thinks his life is the only stage worth being on and that I have been deeply unhappy being offstage for so long, but now, now! he is inviting me back on to the stage - role unknown - and I will trip over myself rushing back. Except I've found a stage of my own, and it's much more beautifully decorated, with much better lights and better, kinder actors, and my role is better than anything he could ever offer me on his stage. I've come to realize his stage is covered in $hit and I don't want to step anywhere near it. I also know he loves a good a chase. Which is why it's best if his emails head straight to the trash bin. He is cruel and I went nc because when i indicated that he was hurting me, he simply continued on doing what he was doing. If he had changed at all, the recent message likely would have made SOME acknowledgement of the relationship we had... so seeing he's the same selfish person, he may start sending mean stuff in my direction because I'm not giving him what he wants. So I'll be making good use of the "send to trash" function of my email service. We have tools to help us, we just have to learn how to use them without questioning ourselves.