Hi all I think ive finally found a way to fix the ffmpeg-devel-owners from being unsubscribed/disabled due to spam bounces
Let me first explain what the problem is, then how we solved it. The problem: 1. spam hits ffmpeg-devel-owners 2. our spam filters remove alot but not all spam 3. spam to ffmpeg-devel-owners is processed my mailman3 4. mailman3 forwards the spam to all the people on ffmpeg-devel-owners 5. some of this spam bounces because it is spam 6. the bounce is now indistingishable from a ffmpeg-devel subscriber 7. the bounce hits our server and is routed to mailman 8. mailman3 increases the bouce score for the address that bounced the spam (if theres a matching subscriber) 9. once the bouce score reaches the threshold the person has his subscription disabled 10. If you followed along, you will realize that mailman now disabled an account but that account was never involved in the bounce mailman2 did not have this issue What we tried: 1. Improve spam filtering, we did not run *-owner through all our spam filters, now we do, but its not enough. future plan here is to install rspamd 2. verp_probes = yes & probe_add_dsn: no This should prevent primary bounces from disabling accounts by having a final test message send (which should ideally not bounce as spam) sadly these seem to be able to bounce too 3. postfix we simply handle the ffmpeg-devel-owner in postfix now and now as mailman doesnt forward it, the return address is distinct from mailing list subscriber mail and thus any bounces from owners dont get counted as subscriber bounces. ATM this is used only for ffmpeg-devel-owner, i intend to enable the same thing for other mailing lists what this also means, you can now again subscribe with the same mail address to the list as used in ffmpeg-devel-owner without being unsubscribed/disabled due to ffmpeg-devel-owner bounces. Of course bounces from normal mailing list mail still can get your account disabled. thx -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB If you fake or manipulate statistics in a paper in physics you will never get a job again. If you fake or manipulate statistics in a paper in medicin you will get a job for life at the pharma industry.
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