mailsecurity.io vs Rackspace Email

Rackspace Email is used by more websites in our catalog: 131 use mailsecurity.io and 7,491 use Rackspace Email.

Rackspace Email sites have the higher median Ahrefs Domain Rating (mailsecurity.io: 13, Rackspace Email: 21).

Between 2026-06 and 2026-07, mailsecurity.io went from 0.02% to 0.01% of all tracked sites, while Rackspace Email went from 0.88% to 0.85%. mailsecurity.io is gaining ground faster in our index.

No. A site runs a single email host, so mailsecurity.io and Rackspace Email are mutually exclusive.

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.