Crossword puzzle clue "mail party"

Forgets to mail the mail, say

They come after signatures in snail mail, yet before signatures in e-mail: Abbr.

___ mail (e-mail folder)

___ mail (e-mail alternative)

Like express mail vis-à-vis regular mail

Mail party

It's probably the biggest party ever for a kid. It's like the biggest party before college. It's what makes a man a man.

Party party