On a read only list I have set up Filter= Only, *@* and Filter= Allow, <myowndomain> in an attempt to cut down on spam attempts. This is fine and has cut out the approval notices but is there anyway I can stop the resultant errors of the messages that cannot now get through, for example:- The enclosed message, found in the <list> mailbox and shown under the spool ID 5010016 in the system log, has been identified as a possible delivery error notice for the following reason: mail origin is listed in the "Filter=" list header keyword (or its default value for the <list> list). Return-Path: <[log in to unmask]> Any help would be appreciated. Wayne