One benefit is that it will all be handled behind the scenes, as opposed to some current methods that ask users to make decisions on whether to accept or decline incoming messages. "A lot of users can handle that, and a lot of users get confused," he said. "The simplest thing for them to see is that the phisher [messages] just don't show up in their e-mail boxes."
Sendmail is adding DKIM to all of its products, he said.
Once some well-known websites such as Yahoo, Paypal and others begin using DKIM, a flood of adoption will occur, he said. "I think that what you're going to see is a rush of places that are going to install it pretty quickly, then it will slow down," Allman said. "The important thing is we'll have a core of sites fairly quickly."