I found it it's always safer to just put my outgoing mail in a blue box I usually mail stuff with tracking with the way things are going these days you can't just drop something in the mail and expected to be delivered where you are sending it I get mail from the people that live in my apartment before me I've been getting it for 18 months the mailman wouldn't take it either until I started getting on his case about it
If you live in an apartment there is a single outbound box, put your mail there. Or use a drop box. Although I recently experienced my first lost package. I took a package to the post office, sent it priority mail from CA to TX and they lost it.
Thanks! Your answer is awaiting moderation.