Variable: nnmail-message-id-cache-length

nnmail-message-id-cache-length is a customizable variable defined in nnmail.el.gz.

Value

1000

Documentation

The approximate number of Message-IDs nnmail will keep in its cache.

If this variable is nil, no checking on duplicate messages will be performed.

Source Code

;; Defined in /usr/src/emacs/lisp/gnus/nnmail.el.gz
(defcustom nnmail-message-id-cache-length 1000
  "The approximate number of Message-IDs nnmail will keep in its cache.
If this variable is nil, no checking on duplicate messages will be
performed."
  :group 'nnmail-duplicate
  :type '(choice (const :tag "disable" nil)
		 (integer :format "%v")))