Variable: nnmail-scan-directory-mail-source-once
nnmail-scan-directory-mail-source-once is a customizable variable
defined in nnmail.el.gz.
Value
nil
Documentation
If non-nil, scan all incoming procmail sorted mails once.
It scans low-level sorted spools even when not required.
This variable was added, or its default value changed, in Emacs 21.1.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/nnmail.el.gz
(defcustom nnmail-scan-directory-mail-source-once nil
"If non-nil, scan all incoming procmail sorted mails once.
It scans low-level sorted spools even when not required."
:version "21.1"
:group 'nnmail-procmail
:type 'boolean)