FROM(1) BSD Reference Manual FROM(1)
from - print names of those who have sent mail
from [-s sender] [-f file] [user]
From prints out the mail header lines from the invoker's mailbox.
-f file The supplied file is examined instead of the invoker's mail-
box. If the -f option is used, the user argument should not
-s sender Only mail from addresses containing the supplied string are
If user is given, the user's mailbox, is examined instead of the invok-
er's own mailbox. (Privileges are required.)
The from command appeared in 3.0BSD.
4th Berkeley Distribution December 30, 1993 1