On Fri, Sep 12, 2014 at 03:35:19PM +0000, MH Michael Hammer (5304) wrote: > > The big change with DMARC is a deprecation of the Sender/From > > differentiation, effectively requiring that these two will be the same. It > > seems that big systems have voted that the differentiation causes more > > harm (spam, phish) than good (remailers). > > This is actually not quite true. If the Sender and the From are in the > same domain then there is no problem. It becomes an issue when the > Sender and the From are different domains. DMARC does not care about > the LHS of the email address (whether it is DKIM signing or SPF > validation). The cases in which only the LHS differs are rather uninteresting though; Christian H. is quite right. We've taken a step backwards. Nico --