protonmail.ch
Mixed
Results vary across protonmail.ch: of 10 URLs tested, 7 are blocked and 3 load normally. The site itself, https://protonmail.ch, is blocked. The Great Firewall blocks the connection outright, silently drops its packets so requests time out and breaks its TLS handshake. 286 tests have been run under this domain since 2014-05-20, the most recent on 2026-07-25.
The site itself
http://protonmail.chas of 2026Blockedhttps://protonmail.chas of 2026Blockedhttp://www.protonmail.chas of 2026Blockedhttps://www.protonmail.chas of 2026BlockedPages and subdomains (6)
https://protonmail.ch/loginas of 2026Blockedhttps://protonmail.ch/inboxBlockedhttp://api.protonmail.chNot blockedhttp://app.protonmail.chas of 2026Blockedhttps://api.protonmail.chNot blockedhttps://api.protonmail.ch/vpn/logicals?SecureCoreFilter=allNot blockedAbout protonmail.ch and the Great Firewall
Results vary across protonmail.ch: of 10 URLs tested, 7 are blocked and 3 load normally. The site itself, https://protonmail.ch, is blocked. The Great Firewall blocks the connection outright, silently drops its packets so requests time out and breaks its TLS handshake. 286 tests have been run under this domain since 2014-05-20, the most recent on 2026-07-25.
A VPN or another circumvention tool routes the request outside mainland China, past the filtering that blocks protonmail.ch. GreatFire runs GreatFire VPN; the Analyzer also tests the domains of many VPN and proxy providers, so you can check whether one is reachable before relying on it.
Elsewhere on the site
Most-blocked .ch domainsEvery tested URL under protonmail.ch
Each URL's status is its verdict over the last 90 days, the same one its own page headlines.