Crossword puzzle clue "e mail action"

It doesn't convey ferocious fuel-burning action, action, action! when it's regular-sized

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

E-mail action

Piece of the action, or a shout that stops the action