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from: print names of those who have sent mail

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from - print names of those who have sent mail

[-c ] [-f file ] [-s sender ] [user ]

The utility prints out the mail header lines from the invoker's mailbox.

The following options are available:

-c: Just print a count of messages and exit.
-f file: The supplied file is examined instead of the invoker's mailbox. If the -f option is used, the user argument should not be used. Read from standard input if file name ``- '' is given.
-s sender: Only mail from addresses containing the supplied string are printed.

If user is given, the user 's mailbox is examined instead of the invoker's own mailbox. (Privileges are required.)

MAIL: If set, the location of the invoker's mailbox. Otherwise, the default in /var/mail is used.

The command appeared in BSD 3.0