Header Fields and Split Fancy

[Holger Sparr <sparr@mfkrs1.mw.tu-dresden.de>]

Hi,

I tried to set up nnmail-split-fancy. I encountered a problem caused
by the capitals in the header fields of my messages.

In the variable `nnmail-split-abbrev-alist' all of the field names
start with a down-case character. I tried to add regular expressions in
the same manner which include the capitalized field names like this.

,----
|  (add-to-list nnmail-split-abbrev-alist 
|              '((anyuc ."From\\|To\\|Cc\\|Sender\\|Newsgroup")
|                (mailuc . "Mailer-daemon\\|Postmaster\\|Uucp")
|                (touc . "To\\|Cc\\|Apparently-To\\|Resent-To\\|Resent-Cc")
|                (fromuc . "From\\|Sender\\|Resent-From"))
|              :group 'nnmail-split
|              :type '(repeat (cons :format "%v" symbol regexp)))
`----

but did not succeed. Neither I did receive an error message nor Gnus
was adding the changes.

What do I miss here? 

Is it possible to "wash" the headers as assumed by nnmail-split-fancy?

TIA,

Holger

-- 
Using Gnus 5.8.3 with Emacs 20.3.1