Anyone Know How to Receive Mailed Items Safely?

I've thought of a few things I might be willing to do in addition to exposing myself dangerously. One of those would require receiving mail from guys, but I have no clue how to do that safely. There's no way I'd do it if there's a chance of someone tracking down my real address, and I know that postal mail boxes aren't terribly safe. (Someone could keep watch at the post office to see who gets the mail from the box, then follow them home.)

I'm not talking about gifts, so a wishlist on a website won't work. What I had in mind to possibly try first was letting guys buy panties in my size, wash them, then cum in the crotch. After it dried they could mail it to me and I'd wear the panties at some point, letting their cum rub against my pussy all day. It wouldn't be remotely as fun as having a total stranger cum inside me, especially when they do so without permission to even have their dick in my pussy, but it'd be a good way to have more stranger's cum at least touching my pussy. Plus I'm certain a lot of guys would love knowing their cum was rubbing against my pussy (or any woman's pussy actually).

So if you know how that can be done, let me know. I'll look into it and decide if I want to go through with it or not. Maybe there's a service out there that does reshipping for people? That'd probably be safe enough.