Google, PayPal, Microsoft and AOL are among 11 high-tech heavyweights uniting behind an effort called DMARC.org. The group says it can through policy-based steps filter out spoofed email that attackers use for phishing. The DMARC site today published guidelines and the specification for its technology. Two services, Agari and Return Path, which participated in the DMARC effort, are offering services to support it. Agari CEO Patrick Peterson says the service can analyze DMARC data to answer, “What are the bad guys doing?””]

