Earlier quoted context omitted.
And most of it is the bulk commercial mail that goes straight into the trash can.
Ever heard of spam? :)
Oh, wait, I can't filter bulk commercial mail - their fees are the USPS's bread and butter. I have to take it out of my mailbox, flip through the flyers, the envelopes that are faked out to look like some sort of official notice, the credit card offers, etc. etc. etc. and dig for the one or two items that are actually for me...and then throw the rest away.