I think the problem is bigger than that. I’ve not checked those specific emails headers, but some time ago, I noticed that subscribers of IETF using DNS-BL black listed email servers were allowed to post. This means that if a spammer is subscribed, or an actual subscriber infected with a virus/bot/whatever, he is able to send all kind of rubbish to the list. As a consequence of that, because my email server is configured to reject messages that have an IP in any header which is DNS-BL, then my email address was unsubscribed. I exchanged a few email with AMS and IAOC, and suggested that we MUST reject any sender that is black listed. NEVER got a response back from the IAOC, despite having been told that they will take care of that. Again: I really think we must reject emails coming from DNS-BL black listed servers. Is up to each postmaster to make sure that the IP addresses of his/her servers are not listed in DNS-BL and his network free of malware that can create problems to others. May be some day, someone at the IAOC can take care of this … instead of ignoring our complains. Regards, Jordi -----Mensaje original----- De: ietf <ietf-bounces@xxxxxxxx> en nombre de <paul@xxxxxxxxx> Responder a: <paul@xxxxxxxxx> Fecha: viernes, 15 de abril de 2016, 19:11 Para: <ietf@xxxxxxxx> Asunto: spam on old lists - was [89attendees] Fw: new important message (fwd) > >Can we have a process where we disallow posting by _everyone_ on the >attendees lists of previous IETF meetings? I think after 4 months there >is no valid reason for allowing to post on those old lists anymore. > >Paul > >---------- Forwarded message ---------- >Date: Wed, 13 Apr 2016 09:15:12 >From: bensons@xxxxxxxxxxxxx >To: 89attendees <89attendees@xxxxxxxx>, > Alexandru Petrescu <alexandru.petrescu@xxxxxxxxx>, > Antoin Verschuren <antoin.verschuren@xxxxxxx>, > Arran Cudbard-Bell <a.cudbardb@xxxxxxxxxxxxxx>, > Dave Cottlehuber <dch@xxxxxxxxxxxxx> >Subject: [89attendees] Fw: new important message > >[ spam deleted]_______________________________________________ >89attendees mailing list >89attendees@xxxxxxxx >https://www.ietf.org/mailman/listinfo/89attendees