On Thu, Oct 28, 2004 at 08:23:38AM +0100, Paul Howarth wrote: > On Thu, 2004-10-28 at 00:02, Nifty Hat Mitch wrote: > > Blacklisting for an ISP is not a good thing but it can also be used to > > advantage. .... > If you follow this policy, the likely result is that all your nets would > end up blacklisted anyway. Many of the blacklists would initially list > only the "problem" net,... You are correct. However in this case the initial poster was at a Public Utility (electricity, phone, and ISP). I suspect that his service obligations as a utility might be different than many service providers. Almost all dial-up nets are known and if not blacklisted they are on a grey list. i.e. RCVD_IN_DYNABLOCK RBL: Sent directly from dynamic IP address In almost all 'utility' situations there must be a well documented process to turn off service. There may also be a public hearing of changes to varius service agreements. My thought is that step one is to identify and isolate the individuals in a way that quality spam detectors will identify the message as possible spam. Of interest each day 5-10 fedora messages trigger incoming spam flags in part because of the senders domain and IP addresses. In this case there is a real need to not trip on free speach rights. As a utility the original poster may need to exercise more caution (process) than a business oriented ISP. As I scanned the site, there was mostly dialup so a number of other service (AOL, EarthLink... ) vendor options would be available. I would make sure that there is a rich help text that covers dozens of mail readers and describes how to filter mail from unwanted senders. Any complaint should include a pointer to this type of help... -- T o m M i t c h e l l May your cup runneth over with goodness and mercy and may your buffers never overflow.