If I find my neighbors mail I put it by their door (unless I know them very well in friend capacity). He doesn’t know you yet he knocks on a door that late to give you mail hhhm In addition mail wasn’t even addressed to you so clearly he used that as an excuse to get you to open the door. It’s creepy.

Not saying you can’t make friends with neighbors but you just moved in and it would take time to actually get to know them enough.

As I thought more about it I am kind of concerned about him knocking on your door and then making up bogus story to force you to actually open the door. Was he intoxicated?? It could remove all his inhibitions (that neighbor I was talking about has serious drinking problem too, but she isn’t a danger, but you don’t know about this guy plus you live alone)

Make sure your door has a very good lock