from(1)from(1)Namefrom - identifies sender of mail
Syntaxfrom [-f mailbox] [-s sender]
Description
The command prints out the mail header lines in a mailbox file to show
you who has sent mail to you.
Options-f mailbox Uses specified file instead of your normal mail
file. If this option is used, but file argument is
not specified, read your mbox file.
-s sender Prints mail headers for mail sent by specified
sender.
Files
/usr/spool/mail/*
See Alsomail(1)from(1)