Yes Hon, keep using your pedal power to stay clear. Have him on the spam blacklist. I love it when it automatically bounces mail back to people I want NC with.
Of course if you need to keep it for legalities, then open a special file and pop each one he sends, in that file unread of course.
Bundle up his gear, and either have a friend take it to him, or as I had to do, got a courier to do the delivery, as no way was I doing it.
The less you have of his, or anything he can give as a reason for contact, the better.
Bear in mind I am talking A here, which means his reason could be any damn thing that flits thru his mind.
God bless