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Feb 12, 13

"Gmail’s current filtering scheme seems designed to focus on domain reputation and minimize the impact of IP reputation."

Feb 11, 13

"Google is currently failing emails sent to Gmail accounts if they are signed with a 512-bit key or less. Now there is evidence that Google is starting to enforce their policy of accepting DKIM keys of 1024-bit or higher."

Nov 06, 12

"A mathematician recently cracked Google’s weak 512-bit DKIM key and impersonated founders Sergey Brin and Larry Page via email. A recent Wired.com article relating the story started a rush in the email industry to create new DKIM keys stronger than 512-bits. Google is taking this security issue seriously by requiring all senders to sign with a 1024-bit DKIM key."

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