I found the solution by myself !!!!! Without any help from anybody !!!!!!
Okay, I confess trs gave me the solution on IRC actually...
In RT_Config.pm :
Set($UseFriendlyFromLine, 0);
----------------------------------------
> From: arthur_ra...@hotmail.com
> To: rt-users@lists.bestpractical.com
> Date: Thu, 23 Feb 2012 10:51:45 +0100
> Subject: [rt-users] Hide reply author in notify message
>
>
> Hello,
> When a ticket is replied, resquestors are notified by e-mail. Is it possible
> to hide the name of the guy who replies in this e-mail ?
> --------
> RT Training Sessions (http://bestpractical.com/services/training.html)
> * Boston March 5 & 6, 2012
--------
RT Training Sessions (http://bestpractical.com/services/training.html)
* Boston March 5 & 6, 2012
