My clients are very interested in Sender Verification services. One of them has a Sendio Appliance, an expensive solution.
http://www.sendio.com/platforms/appliance/ Anyone know, in this post-declude world, how we could accomplish something like that? Sender sends mail ; sender verification sends them an e-mail, letting them know that they need to reply in order to be on the approved senders list. After that, it’s never blocked again. Would love to hear anyone’s thoughts on the matter. - Michael Cummins
