from(1)from(1)NAMEfrom - who is my mail from?
prints the mail header lines in your mailbox file to show who sent you
mail. If user is specified, user's mailbox is examined instead of your
own. If the option is given, only headers of mail from sender are
List header lines for all current mail in your mailbox that was sent by
was developed by the University of California, Berkeley.
SEE ALSOmail(1), prmail(1).