You can't really stop someone from contacting you if they really want to
no, but you can make it exceedingly difficult for them.
i don't understand why you can't block him on
both your email accounts. do you not have an option to do that within your email package?
also, since you think there is a chance he will show up at your house, it might be wise to have a plan of action in place. i know for myself, if i think it all the way through and decide what i will do, it minimized the stress.
when i split with xABF, i didn't answer the door without looking out the window and seeing who it was. if it was him, i didn't answer. i also left the outdoor light on all night, so that i could see who it was.
naive