deCloudflare/subfiles/cloudflared/gmail_email_domains.md

How many % of email (email exchanged between Gmail) domains are using Cloudflare?

• google-starttls-domains.csv

This file contains, for the most recent day reported, the approximate percentage
encrypted for each “bucket” of email large enough to be reported upon.

Here's the result.

Type	Count
Cloudflare	13,155
Normal	43,897

23.1% of email (email exchanged between Gmail) domains are using Cloudflare.