Our observation here has been that only Yahoo addresses, and those of other services which also uses the DMARC algorithm generate bounces. Because the From: address contains yahoo.com, and the IP address of the list server does not reverse resolve to a yahoo.com server, the list email is refused by Yahoo. The list of refusing servers includes Yahoo, Comcast, AT&T, Hotmail and a number of others.
Lindsay Haisley (512) 259-1190 (land line) (512) 496-7118 (mobile) Sent from my iPhone On Apr 11, 2014, at 8:28 PM, Peter Shute <psh...@nuw.org.au> wrote: > I hadn't heard of this till now. Could somebody please confirm if my > understanding of the issue is correct? > > This is what I'm thinking will happen, please correct where I'm wrong: > - A list member sends an email to the list from a yahoo address > - The list sends that email out to all the list members > - The recipients' mail servers will (might?) check with yahoo what to do with > the email, and will be advised to reject it > - The list will receive a bounce for every email address whose mail server > follows that advice > - Those recipients whose mail server follows the advice will not receive the > message > - The list will increment the bounce score for all those affected > receipients, but only once per day > - The increment will be 1 because this is a hard bounce > - If the score reaches the bounce_score_threshold before the > bounce_info_stale_after number of days has passed since the most recent > bounce, then the member's subscription is disabled. > > If that's correct then my understanding is that: > - If a list has at least one active yahoo member then pretty soon everyone's > subscription will be disabled (not unsubscribed?). > - If a list receives vey few messages from yahoo addresses then the only > effect will be that their messages don't get through, and that they might > still get through to some people. > > I'm a moderator for a cpanel list, but don't have access to any of the > settings. Can someone tell me what the default settings are for > bounce_score_threshold and bounce_info_stale_after? I'm assuming ours might > still be whatever the defaults are. > > Am I right in thinking that if we make these values high enough, we'll see no > accounts disabled, and the only side effects will be more bounces and yahoo > mail won't get through? Would this be an acceptable solution for a list with > only 1000 members and low traffic, assuming we warn the yahoo members to use > a different address? > > Peter Shute > > Siniša Burina wrote: > I believe there's no need to elaborate on the problems recently introduced by > Yahoo, changing their > DMARC DNS record and rendering many mailman lists unusable for Yahoo mail > users. > ------------------------------------------------------ > 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/fmouse%40fmp.com ------------------------------------------------------ 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
