Microsoft faces tough sell for sender ID
Microsoft on Tuesday claimed rapid adoption of its Sender ID framework for email authentication to fight spam, but at least one analyst firm said the software maker is waging an uphill battle in the industry.
On the eve of the second annual Email Authentication Summit in Chicago, Microsoft got the market machine humming for Sender ID, claiming its adoption has increased in March to 21 percent of Fortune 500 companies, compared with seven percent the same month a year ago.
Sender ID uses Microsoft's proprietary Purported Responsible Address method for checking the headers with a message body to verify the legitimacy of the domain name from which an email is sent. Sender ID also supports the Sender Policy Framework Classic method, which looks only at envelope headers outside the message body; but the authentication system generally implies the PRA method.
