Re: [Mailman-Developers] MM3 DMARC mitigations

2016-11-07 Thread Stephen J. Turnbull
Barry Warsaw writes: > It will probably make no difference, but if we can inform users as > to the real culprits in this mess, they can either complain to > their ISPs or vote with their feet and find a new provider. That > won't happen if they continue to blame the list software or site. We

Re: [Mailman-Developers] MM3 DMARC mitigations

2016-11-07 Thread Mark Sapiro
On 11/07/2016 06:05 PM, Barry Warsaw wrote: > > With some verbiage massaging perhaps, I am supportive of a "hammer" option > such as this. Maybe we can't enable it by default, but I don't think it's > unreasonable for site/list admins to be able to be more proactive in their > rejection of such m

Re: [Mailman-Developers] MM3 DMARC mitigations

2016-11-07 Thread Barry Warsaw
On Nov 06, 2016, at 05:39 PM, Stephen J. Turnbull wrote: >Maybe it's time to default to rejecting posts from p=reject domains, >with the explanatory message: > >Your domain publishes a "p=reject" DMARC policy, which is a >statement to recipients that they allow you to send only >authen