Quantcast Top 10k5,384 of 10,000
Quantcast Top 100k48,088 of 100,000
BuiltWith Top Million339,667 of 823,409
Entire Internet41,973,659 of 371,396,617
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The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.
http://www.openspf.org/
Categories: Email Hosting Providers · Standard
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We know of 41,973,659 live websites using SPF in our records.
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DKIM
34,381 websites
DMARC
35,637 websites
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