Quantcast Top 10k7,018 of 10,000
Quantcast Top 100k61,076 of 100,000
BuiltWith Top Million466,497 of 807,683
Entire Internet56,538,951 of 374,464,659
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The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.
Categories: Email Hosting Providers · Standard
This chart shows the amount of websites within the top 10k, 100k, and 1 million sites groups that are categorized as being in the specific vertical.
We know of 56,538,951 live websites using SPF in our records.
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