Stack census— back to the censusSurvey 016 · 07.10.2026

Mail Clients · open source · awesome-sysadmin

Thunderbird

thunderbird.net · HTTP 403 in 253 ms

3 things were found in the response on 07.10.2026. This is the front door only: whatever runs behind a login, and anything a browser would have to execute to reveal, is not here.

Where it is served from

Cloudflarecdn
  • header — server: cloudflare
  • header — cf-ray: a46abfac085c368c-FRA

Where their email goes

Google Workspacewebmail · email
  • dns — MX 10 alt3.aspmx.l.google.com
  • dns — MX 10 alt4.aspmx.l.google.com

Everything else

HTTP/3miscellaneous
  • header — alt-svc: h3=":443"; ma=86400

Back to the census.