To me, no contact is no contact, and usually done for specific reasons, and something that I have found I needed to be black/ white about with certain people in my own life. Especially if there’s a history of it being a slippery slope, and having something like that open pandora’s box up all over again. However, if you say you’re still in communication, and trying to be friends, then that to me sounds like attempting limited contact? Time will tell whether that’s something you can do or not, or it’s just going to keep pulling you back in and keeping you in it, if even just mentally.
You can also see what he does, and respond in kind if you get a card from him. That’s another thing, there’s also the possibility of sending a card or communicating holiday wishes, and getting no response from his end, which might upset you all over again. I don’t know,, but I think it’s a good thing to bring up, very common for people to wonder about that (holidays, birthdays)..