Variable: mail-personal-alias-file
mail-personal-alias-file is a customizable variable defined in
sendmail.el.gz.
Value
"~/.mailrc"
Documentation
If non-nil, the name of the user's personal mail alias file.
This file typically should be in same format as the .mailrc file used by
the Mail or mailx program.
This file need not actually exist.
Probably introduced at or before Emacs version 19.29.
Source Code
;; Defined in /usr/src/emacs/lisp/mail/sendmail.el.gz
;;;###autoload
(defcustom mail-personal-alias-file "~/.mailrc"
"If non-nil, the name of the user's personal mail alias file.
This file typically should be in same format as the `.mailrc' file used by
the `Mail' or `mailx' program.
This file need not actually exist."
:type '(choice (const nil) file))