On 2016-07-29 at 15:24 +0100, Patrick O'Callaghan wrote: > It's tempting to think so, but there are also users with pacbell and > bellsouth addresses who have similar problems. I note that both of them > route their mail through prodigy.net, if that means anything. > > poc
Apparently, prodigy.net email service is actually provided by yahoo; https://en.wikipedia.org/wiki/Prodigy_(online_service)#A_public_company So it is really just yahoo having problems with emails from their own customers that passed through a mailing list. I got the hint by the error message given by the prodigy mailserver when attempting to spoof a yahoo From: > <<< 554 5.7.9 Message not accepted for policy reasons. See > https://help.yahoo.com/kb/postmaster/SLN7253.html > 554 5.0.0 Service unavailable I'm quite sure it is related to their DMARC reject policy (perhaps even marked internally). It asserts that yahoo.com emails will only ever come from yahoo servers, and non-complaint emails shall be *rejected*. This makes complete sense for eg. paypal.com but for a free mail provider like yahoo imho such policy is broken. Precisely because it completely breaks mailing lists: https://en.wikipedia.org/wiki/DMARC#Mailing_lists Also, it should be noted that other providers may also be taking that into account. For instance gmail accepts those DMARC-failing messages, but they are sent to the Spam folder. There are a few options in recent mailman versions for handling this, although none seems specially appealing: https://wiki.list.org/DEV/DMARC Best regards _______________________________________________ evolution-list mailing list [email protected] To change your list options or unsubscribe, visit ... https://mail.gnome.org/mailman/listinfo/evolution-list
