Well i found a plugin page http://www.sympa.org/manual/ldap or manual to do it with ldap and if you access the puppet repository

svn co svn://svn.mageia.org/svn/adm/puppet/

you will find an puppet/modules/sympa/templates/auth.conf which does the ldap binding for auth in addition to that

[root@x0 templates]# grep -ir ldap *
auth.conf:ldap
auth.conf:        host                            ldap.<%= domain %>
auth.conf:        bind_password                   <%= ldap_password %>
config:<% if subscriber_ldap_group and not subscription_open %>
config:<% elsif sender_ldap_group %>
config:send restricted_<%= sender_ldap_group %>
config:<% if subscriber_ldap_group %>
config:include_ldap_query
config:    host ldap.<%= domain %>
config:    filter (memberOf=cn=<%= subscriber_ldap_group %>,ou=Group,<%= dc_suffix %>)
config:    passwd   <%= ldap_password %>
data_sources/ldap_group.incl:include_ldap_2level_query
data_sources/ldap_group.incl:        host     ldap.<%= domain %>
data_sources/ldap_group.incl:        passwd   <%= ldap_password %>
scenari/sender.ldap_group:search(<%= name %>.ldap)  smtp,md5,smime  -> do_it
search_filters/group.ldap:host        ldap.<%= domain %>:636
search_filters/group.ldap:bind_password <%= ldap_password %>

so ldap is used at some spots in the config, currently i dont know the ldap design, or what identity sets on its site

From: Ross Wilson <ross.wilson@mail.com>
To: Mageia Sysadmin discussions <mageia-sysadm@mageia.org>
Sent: Thursday, September 20, 2012 8:56 AM
Subject: Re: [Mageia-sysadm] Email change replication between identity and sympa

As far as I can see Sympa doesn't have a 'standard database'; it uses an RDBMS like Postgres, MySQL etc, or am I missing something?

 
----- Original Message -----
From: nicolas vigier
Sent: 09/20/12 12:57 AM
To: Mageia Sysadmin discussions
Subject: Re: [Mageia-sysadm] Email change replication between identity and sympa

 
On Wed, 19 Sep 2012, Ross Wilson wrote: 

> Hi, 
> 
> I recently came across this: 
> 
>    However there are many areas where it's possible to help without having 
>    root access. For instance : 
>    - we need to find a solution so that email changed on 
>       identity.mageia.org is automatically changed on sympa mailing lists. 
>       This require making some changes to identity and/or sympa. 
> 
> 
> Has this issue been resolved? If not, I feel I may be able to resolve it; it would most likely require some level of 
>  access to the databases holding the email information, but I feel it would be pretty 
> trivial to setup some sort of trigger which will update sympa if identity.mageia.org 
>  is updated (and vice versa?). 

See 
http://www.mageia.org/pipermail/mageia-sysadm/2012-September/004717.html 

> 
> To this end, I have submitted an account request in bugzilla. 

You don't need an account to develop an ldap trigger or identity plugin. 

Identity sources are available on svn : 
http://svnweb.mageia.org/soft/identity/CatDap/trunk/ 

And database is standard sympa database. 

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