Variable: nnmail-prepare-incoming-header-hook
nnmail-prepare-incoming-header-hook is a customizable variable defined
in nnmail.el.gz.
Value
nil
Documentation
Hook called narrowed to the headers of each message.
This can be used to remove excessive spaces (and stuff like that) from the headers before splitting and saving the messages.
Probably introduced at or before Emacs version 20.1.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/nnmail.el.gz
(defcustom nnmail-prepare-incoming-header-hook nil
"Hook called narrowed to the headers of each message.
This can be used to remove excessive spaces (and stuff like
that) from the headers before splitting and saving the messages."
:group 'nnmail-prepare
:type 'hook)