I did a Tap Research Survey this morning that led me to search for ways to do physical mail from a website. You deposit funds for postage, then upload a PDF or DOCX file to send to any USPS address and send it.
Sounds like the ultimate solution for those who have more money than time. No buying stamps or going to the Post Office to send it. Do everything right from your home computer.
I am almost curious enough to try it, so I thought I would ask around and see if anyone else has.