On Sat, Dec 05, 2015 at 12:57:23PM +1100, Brian May via luv-main wrote:
First you need to convince the list administor to change it back. There was a long discussion on luv-talk (something like this should have been discussed on luv-main IMHO) you may have missed, see the first messsage:
http://lists.luv.asn.au/pipermail/luv-talk/2015-November/003584.html
In that thread, I have attempted to convince the list administrator to use dmarc_moderation_action *instead of* from_is_list, as recommended by the Mailman documentation; effectively only rewriting the "From:" field where necessary, and I believe that's an acceptable compromise to many more people than the current solution.
Basically rewriting the address is required so us not to break DKIM and DMARC.
Only where the message has been sent from a domain with a restrictive DMARC policy like dmarc_moderation_action does; not every single message, as from_is_list does.