[LINK] dmarc and mailing list issues

Scott Howard scott at doc.net.au
Thu Nov 26 17:29:03 AEDT 2020

Don't let one poorly configured (by today's standards) mailing list put you
off using DMARC...

The Link list does several things that were common many years ago, but are
not best practices today as they cause DMARC/DKIM to fail (such as
modifying the subject)

The real solution (or at least, the nearest thing to it) is ARC, but that
also isn't implemented by this list.



On Wed, Nov 25, 2020 at 10:08 PM Kim Holburn <kim at holburn.net> wrote:

> I set up dmarc out of interest and I am getting the odd error message from
> yahoo and fastmail.
> Apparently the problem is that emails from me to the link list when they
> reach subscribers have my email in the from: header but the
> domain mailman.anu.edu.au in the envelope and they don't match.
> According to Dr duckduckgo this can cause people with yahoo.com
> email addresses to bounce the emails and then subsequently get removed as
> a subscriber.
> This is described here: https://mail-list.com/yahoo-dmarc-solution/
> and here:
> https://dmarc.org/wiki/FAQ#Is_there_special_handling_required_to_receive_DMARC_email_from_mailing_lists.3F
> And there seems to be no real solution apart from messing with each
> mailing list which is not possible for subscribers.
> So far I'm not sure DMARC isn't more trouble than it's worth.
> Kim
> --
> Kim Holburn
> IT Network & Security Consultant
> T: +61 2 61402408  M: +61 404072753
> mailto:kim at holburn.net  aim://kimholburn
> skype://kholburn - PGP Public Key on request
> _______________________________________________
> Link mailing list
> Link at mailman.anu.edu.au
> http://mailman.anu.edu.au/mailman/listinfo/link

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