On Jul 06, 2013, at 09:00 PM, Franck Martin wrote:
Similarly, I'm interested to offer the option to list administrators to transition to a behavior that makes the lists safe/working/compatible with DMARC. As Patrick explained, there are about 3 possibilities, while I'm interested more in some than others (I personally experimented with the patch to mailman 2.1), it is only fair to offer the 3 options and let the list administrator choose the one more suitable for his/her needs. Once Patrick has a better understanding on how to best implement these 3 options, it will be easy, like for openDMARC, to sponsor the work to make it as part of mailman3. I know that several DMARC.org members have shown interest to do so.
One other thing to keep in mind. Most list administrators have no clue how to configure their lists. Just like most technologies, they'll use whatever defaults get shipped. Postmaster are more clueful for sure (our own python.org ones being tip top :) and some of them do get involved in list configurations.
MM3 supports "list styles" which are essentially composable settings applied when a mailing list is created. If there could even be such a thing as a "DMARC style", it would only need to touch the DMARC related options, and this style could be shipped in the previously mentioned plugin.