> -----Original Message----- > From: ietf [mailto:ietf-bounces@xxxxxxxx] On Behalf Of John Levine > Sent: Wednesday, November 02, 2016 12:56 PM > To: ietf@xxxxxxxx > Subject: Re: IETF Mailing Lists and DMARC > > In article <CAPt1N1k1wg9mbN-guuarFP0NvX7v-suOY-bP=TDEOCVhK- > epmg@xxxxxxxxxxxxxx> you write: > >And yet it is still happening, despite there being a great deal of > >discussion in the archives... :/ > > Yes, because at this point, all of the solutions are worse than the problem. > See this page for a roundup of DMARC mitigations: > > http://wiki.asrg.sp.am/wiki/Mitigating_DMARC_damage_to_third_party_ma > il > > The work on ARC is coming along fairly fast. There was a second compatibility > event a couple of weeks ago among various implementations, and people > tell me there should be usable libraries around the end of the year. Once > there's an ARC addon for Mailman and we use that, the DMARC damage > should drop considerably, without us having to change the way we use our > lists. > It's not clear to me that this is true John. DMARC Validators will need to take ARC into consideration and we don't know what adoption will look like other than a handful of players at this point. Mike