>Totally the wrong thread, so I'll apologize profusely now. Subject line changed. >GMail is set to turn on DMARC reject strict by sometime early next >year [1] being one of the last big web mail providers to do so; so, >Mailman "From:" rewriting (or turning on the ability for IETF list >subscribers to toggle this for their sends) might need to be done for >IETF lists. Members of the DMARC group have submitted two drafts draft-andersen-arc-00 and draft-jones-arc-usage-00 which describe a mutation of DKIM intended to let mailing lists coexist with DMARC without having to do ugly hacks like rewriting the From: line. I have reason to believe that several large mail systems intend to implement this reasonably soon. The obvious place to discuss this is the DMARC WG, not here. R's, John