Re: Gmail's receiving mostly authenticated email

On Dec 14, 2013, at 9:56 PM, Peter Gutmann wrote:

Bill Stewart writes:

...

Saw an interesting article from Gmail on their inbound email statistics. Over 91% is authenticated with either DKIM or SPF.

What percentage of that is using 512-bit keys?

Zero. DKIM requires at least a 1024-bit key. Whatever you might want to say about those is a different discussion. SPF is non-cryptographic authentication. Jon