[Mailman-Users] DMARC issues

[Peter Shute]

> On 12 Apr 2014, at 9:28 pm, "Mark Sapiro" <mark at msapiro.net> wrote:
> 
>>> Additional reading at <http://www.dmarc.org/faq.html#s_3>,
>>> <http://blog.threadable.com/how-threadable-solved-the-dmarc-problem> and
>>> <http://www.spamresource.com/2014/04/run-email-discussion-list-heres-how-to.html>
>>> and other articles linked from those.
>> 
>> From the threadable article:
>> “He recommends that all list administrators immediately stop delivering to Yahoo addresses to limit damage, and encourage members to move to a more friendly provider."
>> 
>> How would not delivering to yahoo addresses help? I thought the problem was with delivering yahoo email to others.
> 
> 
> See Jim P's post in this thread at
> <https://mail.python.org/pipermail/mailman-users/2014-April/076383.html>
> and the branch linked therefrom, although you probably don't have the
> access required to install it.
> 
> Jim P's approach is to reject any post From: a domain with a DMARC
> policy of reject.
> 
> To accept a post and then not deliver it to some because you know it
> won't be accepted is arguably wrong, and also, you can't know except by
> experience which recipient domains will reject the post for DMARC
> policy. I've seen the following:

But note that the part of the threadable article I quoted talks about not *delivering* to yahoo addresses. I would thought that shouldn't be a problem.

Peter Shute