On Sep 13, 2014, at 9:49 AM, "John Levine" <johnl@xxxxxxxxx> wrote: >> Agreed, but just wanted to add one thing- doesn't the details of the whether the sender >> has to align or not depends on whether SPF or DKIM is used as the authentication method? > > No. Neither DKIM nor SPF have any connection to either the From: or > Sender: header other than what DMARC is trying to do. DKIM has a required hash bind to the 5322.From field data -- the only 5322 header signing requirement in DKIM. It's burned into the now DKIM now STD level specification. That's not a DMARC requirement, but one DMARC relies on having with DKIM. Maybe an errata is in order? -- Hector Santos http://www.santronics.com