[sympa-fr] anonymous_sender option doesn't work

["dan1" <adresse@cachée>]

Hello all again,

I have the anonymous_sender option that doesn't seem to be working.
I have setup a list with the following config file:

-------------
## Template of a moderated list ; moderator is notified when a message
## is proposed and receives a MD5 key. He can either DISTRIBUTE or REJECT
## it. (see also editor or editorkey)
send editorkeyonly
subject Sample of a moderated list (try-moderated).
## Not listed with LIST command
visibility secret
subscribe open,notify
unsubscribe open,notify
reply_to_header
value other_email
other_email adresse@cachée
apply forced
review owner
anonymous_sender adresse@cachée
web_archive
access closed
owner
email adresse@cachée
## 2 editors for this list
editor
email adresse@cachée
------------

However, when I send an e-mail to the list, the users receive the full 
content of the X-... headers and nothing is anonymous. I can even see the 
sender's IP address, e-mail address, his ISP's information and so forth.
I know that the list is properly setup, because I can see the difference in 
the headers of received e-mails if I change another option's value.

Could you please help me with that ?

Thank you,
Daniel