FROM(1) General Commands Manual FROM(1)
from - display the sender and date of newly-arrived mail messages
from [ -s sender ] [ username ]
from prints out the mail header lines in your mailbox file to show you
who your mail is from. If username is specified, then username's mail-
box is examined instead of your own.
-s sender Only display headers for mail sent by sender.
biff(1), mail(1), old-prmail(1)
9 September 1987 FROM(1)