mailname - the visible mail name of the system
The file /etc/mailname
is a plain ASCII configuration file, which on a
Debian system contains the visible mail name of the system. It is used by many
different programs, usually programs that wish to send or relay mail, and need
to know the name of the system.
The file contains only one line describing the fully qualified domain name that
the program wishing to get the mail name should use (that is, everything after