biff is a mail notification system for UNIX with support for instant notification in the terminal the recipient is logged in to.
When a new mail message is delivered, the program biff alerts the recipient so he can read it immediately. The alert is sent to the tty where the recipient is logged in, and contains the Subject, From line, and first few lines of the body of the new message. The alert also includes terminal beeps to guarantee quick attention.
To enable notification: biff y
To disable notification: biff n
There are many biff replacements, several with similar names like xbiff
, xlbiff
, kbiff
, gnubiff
, wmbiff
, imapbiff
and xbuffy
.
Source: biff - Wikipedia