The story on that - “Neither rain nor snow nor gloom of night . . . “ is not their official mission statement. The motto was chiseled or engraved on a building owned by a private courier service, before the Post Office took it over, something like that.
So it ain’t theirs, I guess, even though it has been attributed to them.
Close. That inscription is on the James Farley Building which used to be the New York General Post Office. It is now owned by NYC and is a mixed use office building. It was never a private enterprise.