How to disabled Sender, X-Trace...

[Marco Blanc]

Hello,

i can't to disabled the Sender, X-Trace and NNTP-Posting-Host fields
with No Gnus 0.11 (XEmacs/21.5-b34 Linux/Fedora 20) :

Sender: arsace@amarseille-654-1-421-242.w90-52.abo.wanadoo.fr
NNTP-Posting-Host: amarseille-654-1-421-242.w90-52.abo.wanadoo.fr
X-Trace: shakotay.alphanet.ch 1391418848 12718 90.52.81.242 :

i have that in my .xemacs/init.el

(eval-after-load "message"
      '(add-to-list 'message-syntax-checks '(sender . disabled)))


Is it possible to disable these fields ?
Thank you.

-- 
M.B