Fastmail vs mx.microsoft

Fastmail is used by more websites in our catalog: 1,580 use Fastmail and 334 use mx.microsoft.

mx.microsoft sites have the higher median Ahrefs Domain Rating (Fastmail: 38, mx.microsoft: 71).

Between 2026-06 and 2026-07, Fastmail went from 0.22% to 0.18% of all tracked sites, while mx.microsoft went from 0.05% to 0.04%. mx.microsoft is gaining ground faster in our index.

No. A site runs a single email host, so Fastmail and mx.microsoft 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.