Quantcast Top 10k6,642 of 10,000
Quantcast Top 100k56,828 of 100,000
BuiltWith Top Million360,181 of 816,644
Entire Internet42,087,801 of 371,379,453
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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 42,087,801 live websites using SPF in our records.
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