Abstract

Sender authentication is a hot topic in the world of email. It has a number of uses and a number of suggested uses. Which ones work in real life? Which ones don’t quite measure up? Can we use authentication to mitigate spoofing? Can we use it to guarantee authenticity? And how do we authenticate email, anyway? Terry Zink provides the answers to these questions and more, this month focusing on the main technology used to digitally sign emails: DKIM.