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Email authentication

The great folks over at MailChimp have compiled a list of which authentication methods (DK, DKIM, SPF and SenderID) are in use at which ISPs.
Good stuff and very clear showing who is using what authentication.

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Yahoo blocks unauthenticated PayPal and eBay Mail

Yahoo announced this morning that over the course of the next few weeks Yahoo would roll out a new feature to their email that blocks any unauthenticated email from eBay and PayPal.
In a blog post Nikki Dugan says:

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AOL publishes sender recommendations

In a blog post on April 28, AOL pointed to their new Sender Best Practices document. These are not things a sender must do in order to get mail delivered to AOL, but rather things that will help improve your reputation at AOL.
The recommendations are what I have been recommending for a while and there is nothing overly surprising in the recommendations.

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