from - Shows whom mail messages are from
from [-s sender] [user]
The from command prints out the mail header lines in your mailbox file.
Prints headers for mail sent by sender.
Specifies a mail spool directory.
Use this flag if you want to examine a mailbox in a directory other
than /usr/spool/mail, which is the system default.
If user is specified, then user's mailbox is examined instead of your own.
1. To display the message headings in your mailbox, enter:
The names of the senders and the message dates are displayed.
2. To display the message headings for mail sent by a specific user,
from -s dale
Displays only the message headings of the messages sent from user
3. To display the message headings in a specific user's mailbox, enter:
The message headings from user dawn's mailbox are displayed, provided
you have read permission for dawn's mailbox.
User mailbox files.
Commands: biff(1), mail(1), mailx(1)