--- univention-ox/udm/handlers/oxmail/oxfolder.py	
+++ univention-ox/udm/handlers/oxmail/oxfolder.py	
@@ -246,9 +246,11 @@ class object(univention.admin.handlers.simpleLdap):
 					break
 			else:
 				ml.append(
+					(
 						'univentionOxSharedFolderDeliveryAddress',
 						self.oldattr.get('univentionOxSharedFolderDeliveryAddress', []),
 						['univentioninternalpostuser+shared/%s@%s' % (self['name'], self['mailDomain'])]
+					)
 				)
 
 				address = '%s@%s' % (self['name'], self['mailDomain'])