diff --git a/net/common/rpc-service.c b/net/common/rpc-service.c
index 8e25358..abedbbd 100644
--- a/net/common/rpc-service.c
+++ b/net/common/rpc-service.c
@@ -198,7 +198,7 @@ ccnet_start_rpc(CcnetSession *session)
     searpc_server_register_function ("ccnet-threaded-rpcserver",
                                      ccnet_rpc_get_emailusers_in_list,
                                      "get_emailusers_in_list",
-                                     searpc_signature_objlist__string());
+                                     searpc_signature_objlist__string_string());
 
     /* RSA sign a message with my private key. */
     searpc_server_register_function ("ccnet-rpcserver",
@@ -1705,15 +1705,15 @@ ccnet_rpc_get_groups_members (const char *group_ids, GError **error)
 }
 
 GList *
-ccnet_rpc_get_emailusers_in_list(const char *user_list, GError **error)
+ccnet_rpc_get_emailusers_in_list(const char *source, const char *user_list, GError **error)
 {
-    if (!user_list) {
+    if (!user_list || !source) {
         g_set_error (error, CCNET_DOMAIN, CCNET_ERR_INTERNAL, "Bad arguments");
         return NULL;
     }
     CcnetUserManager *user_mgr = ((CcnetServerSession *)session)->user_mgr;
 
-    return ccnet_user_manager_get_emailusers_in_list (user_mgr, user_list, error);
+    return ccnet_user_manager_get_emailusers_in_list (user_mgr, source, user_list, error);
 }
 
 #endif  /* CCNET_SERVER */
diff --git a/net/common/rpc-service.h b/net/common/rpc-service.h
index f62e063..9f38f7f 100644
--- a/net/common/rpc-service.h
+++ b/net/common/rpc-service.h
@@ -329,7 +329,7 @@ char *
 ccnet_rpc_get_primary_id (const char *email, GError **error);
 
 GList *
-ccnet_rpc_get_emailusers_in_list(const char *user_list, GError **error);
+ccnet_rpc_get_emailusers_in_list(const char *source, const char *user_list, GError **error);
 
 #endif /* CCNET_SERVER */
 
diff --git a/net/server/user-mgr.c b/net/server/user-mgr.c
index 7f8cb28..5cefa86 100644
--- a/net/server/user-mgr.c
+++ b/net/server/user-mgr.c
@@ -1904,6 +1904,7 @@ ccnet_user_manager_get_login_id (CcnetUserManager *manager, const char *primary_
 
 GList *
 ccnet_user_manager_get_emailusers_in_list (CcnetUserManager *manager,
+                                           const char *source,
                                            const char *user_list,
                                            GError **error)
 {
@@ -1927,11 +1928,6 @@ ccnet_user_manager_get_emailusers_in_list (CcnetUserManager *manager,
         return NULL;
     }
     GString *sql = g_string_new ("");
-    g_string_printf (sql, "SELECT e.id, e.email, is_staff, is_active, ctime, "
-                          "role, passwd FROM EmailUser e "
-                          "LEFT JOIN UserRole r ON e.email = r.email "
-                          "WHERE e.email IN (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)");
-
     for (i = 0; i < 20; i++) {
         if (i < user_num) {
             j_obj = json_array_get (j_array, i);
@@ -1941,6 +1937,36 @@ ccnet_user_manager_get_emailusers_in_list (CcnetUserManager *manager,
             args[i] = "";
         }
     }
+
+#ifdef HAVE_LDAP
+    if (manager->use_ldap) {
+        if (strcmp (source, "LDAP") == 0) {
+            g_string_printf (sql, "SELECT l.id, l.email, is_staff, is_active, role "
+                                  "FROM LDAPUsers l LEFT JOIN UserRole r "
+                                  "ON l.email = r.email "
+                                  "WHERE l.email IN (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)");
+            if (ccnet_db_statement_foreach_row (manager->priv->db, sql->str, get_ldap_emailusers_cb, &ret, 20,
+                                        "string", args[0], "string", args[1], "string", args[2],
+                                        "string", args[3], "string", args[4], "string", args[5],
+                                        "string", args[6], "string", args[7], "string", args[8],
+                                        "string", args[9], "string", args[10], "string", args[11],
+                                        "string", args[12], "string", args[13], "string", args[14],
+                                        "string", args[15], "string", args[16], "string", args[17],
+                                        "string", args[18], "string", args[19]) < 0)
+                ccnet_warning("Failed to get users in list %s.\n", user_list);
+
+            goto out;
+        }
+    }
+#endif
+    if (strcmp (source, "DB") != 0)
+        goto out;
+
+    g_string_printf (sql, "SELECT e.id, e.email, is_staff, is_active, ctime, "
+                          "role, passwd FROM EmailUser e "
+                          "LEFT JOIN UserRole r ON e.email = r.email "
+                          "WHERE e.email IN (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)");
+
     if (ccnet_db_statement_foreach_row (manager->priv->db, sql->str, get_emailusers_cb, &ret, 20,
                                         "string", args[0], "string", args[1], "string", args[2],
                                         "string", args[3], "string", args[4], "string", args[5],
@@ -1951,6 +1977,7 @@ ccnet_user_manager_get_emailusers_in_list (CcnetUserManager *manager,
                                         "string", args[18], "string", args[19]) < 0)
         ccnet_warning("Failed to get users in list %s.\n", user_list);
 
+out:
     json_decref (j_array);
     g_string_free (sql, TRUE);
 
diff --git a/net/server/user-mgr.h b/net/server/user-mgr.h
index 309b810..7cdddae 100644
--- a/net/server/user-mgr.h
+++ b/net/server/user-mgr.h
@@ -171,6 +171,7 @@ ccnet_user_manager_get_login_id (CcnetUserManager *manager,
 
 GList *
 ccnet_user_manager_get_emailusers_in_list (CcnetUserManager *manager,
+                                           const char *source,
                                            const char *user_list,
                                            GError **error);
 #endif
diff --git a/python/ccnet/rpc.py b/python/ccnet/rpc.py
index a7ca89e..2b4b837 100644
--- a/python/ccnet/rpc.py
+++ b/python/ccnet/rpc.py
@@ -451,6 +451,6 @@ class CcnetThreadedRpcClient(RpcClientBase):
     def get_groups_members(self, group_ids):
         pass
 
-    @searpc_func("objlist", ["string"])
-    def get_emailusers_in_list(self, user_list):
+    @searpc_func("objlist", ["string", "string"])
+    def get_emailusers_in_list(self, source, user_list):
         pass