Manually removing the parameter from the config file fixes the problem. So this parameter probably should be deleted from the config file during the postfix upgrade. I don't know which postfix version dropped the support for this parameter. I saw the warning messages the first time after the upgrade today.
Regards Uwe -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org