Support #384
closed
decide how to proceed with DMARC and mailinglists
Added by Christian Lohmaier about 10 years ago.
Updated almost 10 years ago.
Description
mails from a domain that has DMARC setup will break when sent via the mailinglist.
our mailinglist setup alters both the body (adds a footer, strips attachments/html) as well (for some lists) the subject → invalidates DKIM signature
as well as keeps the Sender address → invalidates SPF rules
The solution suggested by https://sys4.de/de/blog/2013/08/11/mailman-dmarc-konform-betreiben/ is to replace the Sender Addrsss by the List's address (so that our domain's rules apply) and put the Sender into Reply-To instead.
http://dmarc.org/faq.html#s_3 lists some variations of the above
- Priority changed from Normal to Urgent
urgent because we need a decision fast, not the implementation of the solution.
Possible ways:
- advise people not to use yahoo or other providers that make use of dmarc for mailinglists
- rewrite the sender's address
- do nothing and live with the bounces
Thanks for raising this! I sadly can't have a look in the next days -
any chance you can check the mlmmj website or mailing lists if people
have a solution at hand there? I assume many lists and projects are
affected by that.
forgot to post the link to the discussion on the mlmmj list:
http://mlmmj.org/archive/mlmmj/2014-05/0000009.html
basically: either act as pure forwarder (no touching of the message at all) → not what we want, we want to strip html/attachments...
or take ownership...
- Status changed from New to Closed
- Precedes Feature #563: PyMIME: Add DMARC conform Header changer added
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