USPS regulations; what is a "letter"?

George Will, in todays Washington Post states that the USPS "competition is limited by law, which forbids anyone else to deliver a letter that is not “urgent.” In USPS regulations what is a ‘‘letter’’?

Here:

http://pe.usps.com/businessmail101/mailcharacteristics/sizeShape.htm
http://pe.usps.com/businessmail101/mailcharacteristics/letters.htm

Not an answer to the question of what defines a letter, but in case you’re curious about the laws that forbids anyone else from delivering letters, the laws are called the Private Express Statutes.

It’s expensive, but Fed Ex delivers a lot of paperwork in those Next Day FedEx paks. They sure look like a letter to me. :wink: They even have that fold over seal flap.

There must be some exceptions to the postal letter rule.

Well, that one is right in the OP. If a letter is “urgent”, i.e. needs to be sent overnight, someone else can deliver it.

OP is written poorly. Not how do the regulations define a letter but how does the ***law *** creating the limitation define a “letter”?

The law doesn’t; the regulations pursuant to the law do. They can be found at 39 CFR part 310 (PDF)

…and so on and so forth. It goes on for several pages, as federal regulations love to do.

So, what prevents me from sending all my “letters” via UPS?

Nothing at all, because UPS acts according to the Private Express exceptions which were linked a few posts up.

Ignore cost and pragmatics and consider a hypothetical. I can use UPS for all my letters under the exception noted above. Apparently everyone can use UPS. So what is the function of the “competition is limited by law” in the quote from George Will in the OP?

Well, any competitor must charge a lot more than the USPS. Specifically, “a letter may be carried out of the mails when the amount paid for the private carriage of the letter is at least six times the rate then currently charged for a 1-ounce single-piece First-Class Mail letter.”