Variable: user-mail-address
user-mail-address is a customizable variable defined in startup.el.gz.
Value
"root@46c0020740a5"
Documentation
The email address of the current user.
This defaults to either: the value of EMAIL environment variable; or
user@host, using user-login-name(var)/user-login-name(fun) and mail-host-address (or system-name(var)/system-name(fun)).
Probably introduced at or before Emacs version 19.26.
Source Code
;; Defined in /usr/src/emacs/lisp/startup.el.gz
(defcustom user-mail-address
(or (getenv "EMAIL")
(concat (user-login-name) "@" (or mail-host-address (system-name))))
"The email address of the current user.
This defaults to either: the value of EMAIL environment variable; or
user@host, using `user-login-name' and `mail-host-address' (or `system-name')."
:initialize #'custom-initialize-delay
:set-after '(mail-host-address)
:type 'string
:group 'mail)