diff -u -r email_distributor.py.old email_distributor.py --- email_distributor.py.old 2011-12-15 15:27:44.744578824 +0100 +++ email_distributor.py 2011-12-15 15:28:35.274578826 +0100 @@ -337,9 +337,9 @@ if self.set_message_id: msgid = self._message_id(event.realm) rootMessage['Message-ID'] = msgid - if event.category is not 'created': - rootMessage['In-Reply-To'] = msgid - rootMessage['References'] = msgid + if event.category is not 'created': + rootMessage['In-Reply-To'] = msgid + rootMessage['References'] = msgid rootMessage['Precedence'] = 'bulk' rootMessage['Auto-Submitted'] = 'auto-generated' provided_headers = formatter.format_headers(transport, event.realm,