[Wien] my membership to the mailing list gets disabled every 3 weeks

[Peter Blaha]

Thanks for the information. I browsed through it and found the two 
possible options in the mailman config, where one can either "mung" or 
"wrap" the from-headers to circumvent the DMARC Policiy.

However, both methods have documented drawbacks, and I'm a bit afraid 
that by changing this setting, it may remove the unsubscribe problem for 
some of you, but on the other hand, some others will not see the mails 
at all or not in proper form ?

At the moment I'm monitoring the bounces and I've also increased the 
bounce level, so that unsubscribing should not happen so often (or a 
bounce reset will happen in between. After removing all "user not known" 
bounces, so far I get only one bounce, probably from an 
"Autoreply"-setting of this mail client ?? (I've informed this user in 
private).

If this does not help on the long run, I'll consider to use one of these 
problematic??? fixes, but as I said, after switching on the monitoring, 
there was no bounce for one of the addresses reporting frequent 
unsubscription.

Regards
Peter Blaha

1.02.2017 um 04:43 schrieb Gavin Abo:
> As Prof. Marks mentioned, I also suspect that it is due to gmail [1] and
> mail.ru [2] recently changing to a stricter DMARC Policy (i.e., from
> p=none to p=reject).
>
> The DMARC reject policy (p=reject) is known to be a problem that is not
> easy for mailing list administrators to address [3], because it
> currently seems that a choice has to be made among a list of imperfect
> solutions that come with their own pros and cons [4].
>
> For an administrator of a mailing list (Mailman), the possible solutions
> listed on the webpage that should be accessible as follows might be of
> interest:
>
> 1. Go to: https://wiki.list.org/
> 2. Click "List administrator tasks" (under FAQs in the left menu)
> 3. Find and click on "What can I do about members being unsubscribed by
> bounces of Yahoo user's posts for DMARC policy reasons?"
>
> [1]
> https://dmarc.org/2015/10/global-mailbox-providers-deploying-dmarc-to-protect-users/
>
> [2] https://team.mail.ru/why-mail-ru-implements-a-strict-dmarc-policy/
> [3] https://wiki.list.org/DEV/DMARC
> [4]
> https://dmarc.org/wiki/FAQ#I_operate_a_mailing_list_and_I_want_to_interoperate_with_DMARC.2C_what_should_I_do.3F
>
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Peter BLAHA, Inst.f. Materials Chemistry, TU Vienna, A-1060 Vienna
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