Andrew Daviel writes: > My real question is, there are two types of "permanent" (500 series) > rejection - recipient problems and message problems. I want mailman to > auto-unsubscribe stale addresses after 5 (bounce_score_threshold) > bounces, but I don't want active addresses to be unsubscribed because 5 > successive viruses or spams got through a relatively quiet list but were > rejected by the recipient's filters.
Expanding on what Mark wrote: It's not possible to reliably distinguish the two cases. Besides the large number of sites that give uninformative status codes to policy (ie, "message problem") rejections, DMARC rejects get a "message problem" status code, but they indicate that you just aren't going to get through to that recipient. If somebody who's had different experience wants to try the experiment and show that it actually has potential for reducing undesired unsubscriptions, I don't mean to discourage them. But I won't do it -- in my experience, such spates of spam getting through the list are miniscule compared to the problems caused by rude and incompetent receivers, so the effort is excessive compared to the return. Steve ------------------------------------------------------ Mailman-Users mailing list Mailman-Users@python.org https://mail.python.org/mailman/listinfo/mailman-users Mailman FAQ: http://wiki.list.org/x/AgA3 Security Policy: http://wiki.list.org/x/QIA9 Searchable Archives: http://www.mail-archive.com/mailman-users%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-users/archive%40jab.org
