thunderbird.net
Mixed
Results vary across thunderbird.net: of 57 URLs tested, 49 are disrupted some of the time, 4 load normally and 4 have no conclusive recent result. 98 tests have been run under this domain since 2020-08-19, the most recent on 2026-10-18.
The two are filtered by different means — an unencrypted request by the address and keywords it carries in the clear, an encrypted one by the server name in its TLS handshake — so one working while the other does not is normal.
The site itself
http://thunderbird.netNot blockedhttps://thunderbird.netIntermittenthttps://www.thunderbird.netIntermittentPages and subdomains (54)
https://mx.thunderbird.netIntermittenthttp://blog.thunderbird.netIntermittenthttps://aus.thunderbird.netIntermittenthttps://new.thunderbird.netNot enough datahttps://blog.thunderbird.netIntermittenthttps://give.thunderbird.netIntermittenthttps://chat.thunderbird.netIntermittenthttps://bolt.thunderbird.netIntermittenthttps://docs.thunderbird.netIntermittenthttps://meet.thunderbird.netIntermittenthttps://ehlo.thunderbird.netIntermittenthttps://live.thunderbird.netNot blockedhttps://mail.thunderbird.netIntermittenthttps://chaos.thunderbird.netNot enough datahttps://addons.thunderbird.netIntermittenthttps://broker.thunderbird.netIntermittenthttps://design.thunderbird.netIntermittenthttps://avatars.thunderbird.netIntermittenthttps://explore.thunderbird.netIntermittenthttps://council.thunderbird.netIntermittenthttps://discuss.thunderbird.netIntermittenthttps://incoming.thunderbird.netIntermittenthttps://bitergia.thunderbird.netIntermittenthttps://coverage.thunderbird.netIntermittenthttps://mx-stage.thunderbird.netIntermittenthttps://developer.thunderbird.netIntermittenthttps://sso.infra.thunderbird.netNot enough datahttps://supporter.thunderbird.netIntermittenthttps://aus-stage.thunderbird.netIntermittenthttps://enterprise.thunderbird.netNot blockedhttps://autoconfig.thunderbird.netIntermittenthttps://live-stage.thunderbird.netIntermittenthttps://newsletter.thunderbird.netNot enough datahttps://matrix-test.thunderbird.netIntermittenthttps://source-docs.thunderbird.netIntermittenthttps://www.explore.thunderbird.netIntermittenthttps://addons-stage.thunderbird.netIntermittenthttps://broker-stage.thunderbird.netIntermittenthttps://notifications.thunderbird.netIntermittenthttps://teleport.infra.thunderbird.netNot blockedhttps://atlantis.infra.thunderbird.netIntermittenthttps://developer-stage.thunderbird.netIntermittenthttps://services.addons.thunderbird.netIntermittenthttps://webextension-api.thunderbird.netIntermittenthttps://extension-finder.thunderbird.netIntermittenthttps://reviewers.addons.thunderbird.netIntermittenthttps://autoconfig-stage.thunderbird.netIntermittenthttps://pro-services-docs.thunderbird.netIntermittenthttps://incoming-telemetry.thunderbird.netIntermittenthttps://versioncheck.addons.thunderbird.netIntermittenthttps://notifications-stage.thunderbird.netIntermittenthttps://victoriametrics.infra.thunderbird.netIntermittenthttps://addons-reviewer-guide.thunderbird.netIntermittenthttps://versioncheck-bg.addons.thunderbird.netIntermittentAbout thunderbird.net and the Great Firewall
Results vary across thunderbird.net: of 57 URLs tested, 49 are disrupted some of the time, 4 load normally and 4 have no conclusive recent result. 98 tests have been run under this domain since 2020-08-19, the most recent on 2026-10-18.
Plain HTTP and HTTPS differ here: http://thunderbird.net is not blocked, https://thunderbird.net is intermittent. The two are filtered by different means — an unencrypted request by the address and keywords it carries in the clear, an encrypted one by the server name in its TLS handshake — so one working while the other does not is normal.
Elsewhere on the site
Most-blocked .net domainsEvery tested URL under thunderbird.net
Each URL's status is its verdict over the last 90 days, the same one its own page headlines.