The mailing list for listmasters using Sympa

[Chris Pax <address@concealed>]

my sympa version: 5.4.6

i have two issue i would love to clear up:
first:
i was under the impression that the other_email option
would mask the list name in out going email. it does not. this feature is
extremely essential for what im doing. for some of my list i only want the 
user
to see address@concealed. here are  mail headers that hold information
that should be hidden:
To: address@concealed
X-pstn-addresses: from <address@concealed> [db-null] 
From: address@concealed
Message-id: <listname.3@anonymous>
Reply-To: not-for-reply@domain
X-Loop: address@concealed
Errors-to: address@concealed
List-Id: <listname.domain.com>
List-Archive: <http://domain.com/sympa/arc/listname>
List-Help: <mailto:address@concealed?subject=help>
List-Owner: <mailto:address@concealed>
List-Post: <mailto:address@concealed>
List-Subscribe: <mailto:address@concealed?subject=subscribe%20listname>
List-Unsubscribe: <mailto:address@concealed?subject=unsubscribe%20listname>

This is all VERY BAD for the case of masking this list hidden. i only want the
subscribers to see not-for-reply and nothing else. also address@concealed should
not be there either.

last:
i have successfully created a send scenario that uses a ldap search filter, 
and
it works. but my owners of the list would like to see who this group is. how
can i go about exposing the users allowed to post from the search filter?