[CentOS] mailing list mail from @yahoo addresses

Fri Nov 4 18:29:32 UTC 2016
lejeczek <peljasz at yahoo.co.uk>

On 04/11/16 17:18, Richard wrote:
> [extracted from "Re: [CentOS] dnf and failing epel" message chain.]
>> From: lejeczek peljasz at yahoo.co.uk
>> Date: Fri Nov 4 13:39:40 UTC 2016
>>> Date: Friday, November 04, 2016 08:51:07 -0400
>>> From: Jonathan Billings <billings at negate.org>
>>>> On Fri, Nov 04, 2016 at 12:30:02PM +0000, lejeczek wrote:
>>>> ps. I wonder if my email get though to the group, I receive
>>>> mailing list emails but I don't get my own emails?
>>> You can sign into this URL:
>>> https://lists.centos.org/mailman/listinfo/centos
>>> ... and change the settings.  One of the settings is whether to
>>> "Receive your own posts to the list".  Make sure it is marked as
>>> "yes".
>> it's been there always.
>> Some mailing lists I do have this problem with, others work
>> fine, and it's not the settings reason, certainly not that
>> one setting and rest looks ok too.
>> I wonder if Centos mailman uses some blocking/blacklisting?
>> But then why the group gets my emails but me?
> I believe that the issue is that yahoo updated their dmarc record a
> bit ago, so now won't accept mail, from 3rd-parties, that has an
> @yahoo... "mailfrom", as yours do on this list.
> If the non- at yahoo mailing sender doesn't do what's necessary to deal
> with enforced dmarc, and your mail provider enforces dmarc, you won't
> see messages from @yahoo correspondents -- which is likely why you
> aren't seeing your own list messages. Additionally if a mailing list
> has enough @yahoo posters, this can generate sufficient bounces to
> get you kicked off the mailing list on a regular basis.
> There are various ways for mailers/mailing lists to deal with the
> enforced dmarc. My understanding is that with Mailman, which this
> list uses, one has to upgrade to -3.
>    Email service providers can't send to/from Yahoo Mail addresses
>    Questions about our DMARC policy
>    Why are my emails bouncing?
>    We've updated the DMARC record with "p=reject" for multiple
>    Yahoo domains.
>    This means all DMARC compliant mail receivers (including Yahoo,
>    Hotmail, and Gmail) are now bouncing emails sent as "@yahoo.com"
>    addresses that aren't sent through Yahoo servers. Any messages
>    without a proper Domain Keys Identified Mail (DKIM) signature or
>    Sender Policy Framework (SPF) alignment will be rejected.
> <https://help.yahoo.com/kb/SLN24016.html>
> <https://yahoomail.tumblr.com/post/82426900353/yahoo-dmarc-policy-change-what-should-senders#_=_>
well, I'm not sure if I feel better now, I understand there 
must a plethora of people who fidgeted like me trying to 
understand what happened (some time ago) - I see I'm not 
alone, but... it seems larger issue. Would be great if list 
maintainer(s) look into this and even greater if can fix it.
many! thanks Richard

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