Ugh. USPS. I cannot actually remember the last time I used their service.
edit: regarding UPS: http://www.dslreports.com/forum/r22924632-ups-using-USPS-for...
We are far more dependent on the USPS than most nerds realize.
Switched to using earth class mail which scans all my incoming postal mail, deposits checks, etc which has been a huge improvement. (and was able to get all the consequences of missing the last $1.50 of a payment I hadn't seen in the mail reversed, after a lot of letters and phone calls).
Most postal mail is spam, mixed with a few important messages.
It's too bad we can't apply baysean algos to spam snail mail. (yes, I know sender pays and all that).