standard mail is?

Question

Which ones are brought to the door and which go to the mailbox?

Answer 1

USPS is United States postal service. If the package can fit in your mailbox, they will just leave it in your mail box. If it cant fit, then they will come to your door. They will come to your door regardless if its a certified mail or needs a signature.

Delivery service like UPS always comes to the door.