Look, I don't think you have to get crazy about the "don't contact me!" stuff - it just lets on that you are still bothered by him, which means he is still getting a reaction.
Just be short and succinct in your responses. Leave out the personal. Be polite. Don't answer questions you don;t want to answer - deflect.
If he brings up divorce stuff, tell him to address those questions to your attorney.
Could he be coming out of the tunnel? Maybe. Should you get your hopes up? No. Should you put the divorce on hold if he comes running back? He!! no! Get your finances squared away, get him committed to support, get your share of his pension etc. THEN, once you're divorced, if he wanted to get clean and straightened out and try to woo you back - sure, you could let him IF you wanted. But get the financial divorce business done first. You cannot trust this guy with your financial well-being.
Maybe he'll wake up enough to be a better father, and that's a good thing. So remember the dog training advice - reward the good behaviors, ignore the bad ones.
Just don't let yourself get sucked back into some kind of fantasy that he's going to change into a different person and come back to save you. Stay focused on your own progress.
