said by DaSneaky1D
:Why add another layer of "authentication" simply because it's tied to a corporate name? What happened to SPF records?
SPF is open, free and barely used (correctly by servers and host records). MS pushing this type of authentication will only further annoy DNS admins by making sure it's "done right" fall on the shoulders of SBS 2003 owners...the core people that still send mail out as "some-company.local"
Spam is a less a problem of preventing it, and more a problem of people thinking they configured their end correctly.
SPF has the old "chicken or the egg" problem I think.