Variable: mail-host-address
mail-host-address is a customizable variable defined in startup.el.gz.
Value
nil
Documentation
The name of this machine, for use in constructing email addresses.
If this is nil, Emacs uses system-name(var)/system-name(fun).
Probably introduced at or before Emacs version 19.29.
Source Code
;; Defined in /usr/src/emacs/lisp/startup.el.gz
(defcustom mail-host-address nil
"The name of this machine, for use in constructing email addresses.
If this is nil, Emacs uses `system-name'."
:type '(choice (const nil) string)
:group 'mail)