Usps has this new service, it's called informed delivery. You have to sign up for it but it's free. It's pretty cool, every day you get an email with photos of the mail you can expect that day and an option to click that you didn't receive a particular package or piece of mail. I haven't had to do that so I'm not sure where it goes from there. Just thought I'd let my fellow ECF'ers know about it because I know how we all like to stalk any and all vapemail headed are way. It does take away some of the mystery when you already know what's in your mailbox but it's a helpful service in my opinion.
I have had informed delivery since it first became available. Prior to that, there was "My Choice" which was only for packages. It is all under informed delivery now. The option to click if you don't receive a piece of mail is limited to regular mail. If you go to the packages tab, that option isn't there. It was the first thing I looked for when the parcel came up delivered but wasn't in my mailbox.