Sender ID Framework Reaches Tipping Point

BOSTON — April 18, 2007 — Today, at the third annual Authentication and Online Trust Summit, Microsoft Corp. published results culminating from a two-year-long study on the effectiveness of Sender ID Framework e-mail authentication in helping counter deceptive e-mail. With Windows Live™ Hotmail® alone detecting over 3.8 billion deceptive messages daily, Sender ID is helping provide real results as a cost-effective solution. Sender ID has enjoyed a threefold increase in adoption, accelerating to 8 million domains worldwide in just under a year.* This technology is helping to realize the promise established by the industry and government agencies to improve trust and confidence in e-mail communications for consumers and marketers alike.

“Spam and phishing attacks continue to undermine user productivity, trust and online confidence. The business value of Sender ID is now providing tangible benefits,” said Ryan Hamlin, general manager of the Technology Care and Safety Group at Microsoft. “Widespread adoption of the Sender ID Framework, continued collaboration with industry, businesses and governments, and a commitment to user education are all promising steps toward protecting the inbox. To help stem this tide of deceptive e-mail, businesses must implement today to protect their brand, their customers and their employees.”

Key Results From the Study

  • Every day, 20 million forged messages are detected by Sender ID-enabled domains.

  • Reputable marketers that have adopted Sender ID have realized improved deliverability, with up to 85 percent fewer messages mistakenly marked as spam in Windows Live Hotmail.

  • With spam increasing 40 percent in the past 12 months, spam in Hotmail users’ inboxes has actually been reduced by 50 percent; Sender ID contributed 8 percent of that reduction.

Benefits Being Realized by Brand Marketers and Online Service Providers

Sender ID is helping major brands, Internet service providers and corporate networks throughout the world improve trust and confidence in their e-mail communications. Industry-leading brands such as eBay and PayPal are increasingly relying on Sender ID to improve trust in their communications with their customers.®, the world’s largest domain name registrar, receives over 30 million communications to its e-mail customers daily. By implementing Sender ID, customers are receiving less spam and having fewer legitimate e-mails junked. Over 50,000 of’s DNS customers are Sender ID-compliant today.

Complete copies of this study may be downloaded from

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