Variable: rmail-delete-after-output
rmail-delete-after-output is a customizable variable defined in
rmail.el.gz.
Value
nil
Documentation
Non-nil means automatically delete a message that is copied to a file.
Source Code
;; Defined in /usr/src/emacs/lisp/mail/rmail.el.gz
(defcustom rmail-delete-after-output nil
"Non-nil means automatically delete a message that is copied to a file."
:type 'boolean
:group 'rmail-files)