http://blog.wordtothewise.com/2008/03/unauthenticated-email/ Spam, delivery, email and more Tue, 06 Jan 2009 18:40:08 +0000 http://wordpress.org/?v=2.5.1 http://blog.wordtothewise.com/2008/03/unauthenticated-email/#comment-1502 George Schlossnagle Tue, 04 Mar 2008 17:59:56 +0000 http://blog.wordtothewise.com/index.php/2008/03/03/unauthenticated-email/#comment-1502 It's not a boolean thing though. I think the more likely outcome is seeing ISPs tie authentication requirements into their whitelisting processes for large senders. While you can not block _all_ unauthenticated mail at any point in the future, it's pretty reasonable to move towards requiring authentication for people who send non-trivial amounts of mail into your network. It’s not a boolean thing though. I think the more likely outcome is seeing ISPs tie authentication requirements into their whitelisting processes for large senders. While you can not block _all_ unauthenticated mail at any point in the future, it’s pretty reasonable to move towards requiring authentication for people who send non-trivial amounts of mail into your network.

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