Microsoft offered an eye-popping statistic at its Authentication and Online Trust Summit in April: Ninety percent of incoming marketing e-mail the software giant processes comes from servers that comply with its Sender ID authentication scheme.
One possible reason for the high percentage? Most of this e-mail originates from service providers whose business it is to make sure their processes conform to industry best practices.
So sure, most marketing e-mail is authenticated. But what about companies’ customer service e-mails? And how about the messages sent from human resources?
Though the Direct Marketing Association and the E-mail Sender and Provider Coalition require authentication as a condition for membership, so far results have been
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