What impact has Yahoo's new "p=reject" DMARC policy had on spam claiming to be from Yahoo.com? "DMARC has reduced spam purported to come from yahoo.com accounts by over 90%," says Alex Stamos, Yahoo's Vice President of Information Security, in his recent testimony before Congress.
H/T: Return Path's Ken Takahashi.
(Note: Alex's title may be Chief Information Security Officer; I've seen him referred to both ways. I decided to use the title referenced in the testimony.)
