On Thu, 18 Aug 1994 10:36:20 EDT Marc Abrahams <[log in to unmask]> said: >What simple precaution can I, as a list owner, take to try to prevent >this kind of problem from recurring. Unfortunately, there is no simple answer to your question. If there were, it would be built in to the code and the problem wouldn't exist. In fact, LISTSERV has a very sophisticated loop detector without which you'd be seeing a LOT more of these problems. Prior to version 1.7f, there was one loop "filter" for all the lists, which was drastic and unforgiving. Some people complained that userids such as POSTMASTER or root were not able to subscribe to mailing lists, which was a problem because on many single-user unix systems, people normally work as root. With version 1.7f, you have two filters, a "safe" one which is the same as the old one, and a new, more tolerant one, which lets POSTMASTER and root talk to LISTSERV and post to lists. The default is to use the safe filter when the list has a return address of the form listname@nodeid, and the new filter when the return address is [log in to unmask] Finally, the default is to use the owner-listname form of return address. So, by default you have the weak filter. I have since then put POSTMASTER@* back into the weak filter, since it turned out that there are a lot of systems that ignore the return address and send delivery errors from POSTMASTER. Anyway, you can enable the safe filter by adding: * Filter= Safe to the list header. Eric