[Mailman-Users] cause of bounces

paul at tokyoprogressive.org paul at tokyoprogressive.org
Tue Oct 10 18:20:19 EDT 2017

Thank you, Mark.  Had to resend this as I forgot to remove the quotes in the first attempt. Re it being a DMARC issue, all the options look bad (except telling people to use another email provider). 

A few are unclear, such as RESTARTING Mailman. How does one restart it? I use Cpanel and do not know the inner workings.

Which do you think it the best of the suggestions? I already have content filtering set to off to allow attachments. And there is currently only a footer that says:

Galeexec mailing list
Galeexec at gale-sig.org <mailto:Galeexec at gale-sig.org>
http://mail.gale-sig.org/mailman/listinfo/galeexec_gale-sig.org <http://mail.gale-sig.org/mailman/listinfo/galeexec_gale-sig.org>

Again, the list is REPLY TO LIST.


I found another article that makes me wonder— https://www.pcworld.com/article/2141120/yahoo-email-antispoofing-policy-breaks-mailing-lists.html <https://www.pcworld.com/article/2141120/yahoo-email-antispoofing-policy-breaks-mailing-lists.html>

it says  "List subscribers with email accounts on servers that perform DMARC checks, such as Gmail, Hotmail (Outlook.com <http://outlook.com/>), Comcast or Yahoo itself, will reject the original message and respond back to the list with automated DMARC error messages"……. making it seem that all of these providers are no-nos.

But later it says "So users of Gmail, Hotmail and other DMARC-enabled providers will not only fail to receive messages sent to the mailing list by Yahoo users, but will flood the list with bounce messages, risking to be bounced off the list themselves”.

This sentence seems to imply that it is YAHOO users who should switch. But the previous quote implies people with all of those providers should switch.

Can you give me your opinion. Is it Yahoo that is breaking mailing lists, or is it Yahoo, Gmail and Hotmail?


Paul Arenson

> On Oct 10, 2017, at 21:58, Mark Sapiro <mark at msapiro.net <mailto:mark at msapiro.net>> wrote:
> On October 9, 2017 11:56:02 PM PDT, paul at tokyoprogressive.org <mailto:paul at tokyoprogressive.org> wrote:
>> Hi and hope the answer(s) to my question are relatively simple. On one
>> of two lists I manage, some people are getting deleted due to too many
>> bounces.  And the bounces seem to be related to their mail provider not
>> allowing the messages.   As far as I can tell, the main culprits are
>> gmail, yahoo, and hotmail.
> I think this is a DMARC issue. See <https://wiki.list.org/x/17891458 <https://wiki.list.org/x/17891458>>.
> -- 
> Mark Sapiro <mark at msapiro.net <mailto:mark at msapiro.net>>
> Sent from my Not_an_iThing with standards compliant, open source software.

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