diff --git a/conf.example.toml b/conf.example.toml
index 9c6a834..a90278b 100644
--- a/conf.example.toml
+++ b/conf.example.toml
@@ -1,5 +1,6 @@
 domain = "unipoly.ch"
-lists = [ "membres"]
+lists_add = ["membres"]
+lists_remove = ["membres"]
 
 [ldap]
 host = "ldap.gnugen.ch"
diff --git a/unipoly-mlmmj-ldap-sync b/unipoly-mlmmj-ldap-sync
index 6daf202..37c3ba7 100755
--- a/unipoly-mlmmj-ldap-sync
+++ b/unipoly-mlmmj-ldap-sync
@@ -40,7 +40,8 @@ def main
 
   domain = conf["domain"]
   basetree = conf["ldap"]["lists"]["basetree"]
-  conf["lists"].each do |cn|
+  lists = (conf["lists_add"] + conf["lists_remove"]).uniq
+  lists.each do |cn|
     puts ">> Processing list #{cn}@#{domain}"
 
     filter = Net::LDAP::Filter.eq("cn", cn)
@@ -75,26 +76,30 @@ def main
             if (subscribers.include?(m))
                subscribers.delete(m)
             else
-               print "Adding #{m}... "
-               mlmmj_sub_binary = conf["mlmmj"]["sub_binary"]
-               %x(#{mlmmj_sub_binary} -L #{list} -a #{m} -q -f -s)
-               if ($?.exitstatus == 0)
-                 puts "OK"
-               else
-                 puts "Failed"
-               end
+              if (conf["lists_add"].include?(cn))
+                print "Adding #{m}... "
+                mlmmj_sub_binary = conf["mlmmj"]["sub_binary"]
+                %x(#{mlmmj_sub_binary} -L #{list} -a #{m} -q -f -s)
+                if ($?.exitstatus == 0)
+                  puts "OK"
+                else
+                  puts "Failed"
+                end
+              end
             end
           end
 
           # Remove remaining "subcribers" (= they did not match with members)
-          subscribers.each do |s|
-            print "Removing #{s}... "
-            mlmmj_unsub_binary = conf["mlmmj"]["unsub_binary"]
-            %x(#{mlmmj_unsub_binary} -L #{list} -a #{s} -q -s)
-            if ($?.exitstatus == 0)
-              puts "OK"
-            else
-              puts "Failed"
+          if (conf["lists_remove"].include?(cn))
+            subscribers.each do |s|
+              print "Removing #{s}... "
+              mlmmj_unsub_binary = conf["mlmmj"]["unsub_binary"]
+              %x(#{mlmmj_unsub_binary} -L #{list} -a #{s} -q -s)
+              if ($?.exitstatus == 0)
+                puts "OK"
+              else
+                puts "Failed"
+              end
             end
           end
           print "\n"