Crossword puzzle clue "modern mail"

Here are the possible solutions for modern mail clue

Answer
Clue
Relevancy
errs
Clue
Forgets to mail the mail, say
Definition
ERR, to make a mistake
pss
Clue
They come after signatures in snail mail, yet before signatures in e-mail: Abbr.
sent
Clue
___ mail (e-mail folder)
snail
Clue
___ mail (e-mail alternative)
speedier
Clue
Like express mail vis-à-vis regular mail
flakjacket
Clue
Modern mail?
spam
Clue
Modern-day junk mail
conant
Clue
He wrote "Modern Science and Modern Man."

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