esmtp.biz
All blocked
Every URL under esmtp.biz that we can reach a verdict on — 10 of them — is blocked in mainland China. The site itself, https://esmtp.biz, is blocked. The Great Firewall poisons its DNS and silently drops its packets so requests time out. 391 tests have been run under this domain since 2016-04-01, the most recent on 2026-08-14.
The site itself
http://esmtp.bizBlockedhttps://esmtp.bizBlockedPages and subdomains (12)
http://it.esmtp.bizBlockedhttp://mss.esmtp.bizUnresolvablehttp://947.esmtp.bizBlockedhttp://584.esmtp.bizBlockedhttp://225.esmtp.bizUnresolvablehttp://416.esmtp.bizBlockedhttp://688.esmtp.bizBlockedhttp://438.esmtp.bizUnresolvablehttp://527.esmtp.bizBlockedhttp://186.esmtp.bizBlockedhttp://tuv3.esmtp.bizBlockedhttp://pc.esmtp.biz/read/go/th10.htmlUnresolvableAbout esmtp.biz and the Great Firewall
Every URL under esmtp.biz that we can reach a verdict on — 10 of them — is blocked in mainland China. The site itself, https://esmtp.biz, is blocked. The Great Firewall poisons its DNS and silently drops its packets so requests time out. 391 tests have been run under this domain since 2016-04-01, the most recent on 2026-08-14.
A VPN or another circumvention tool routes the request outside mainland China, past the filtering that blocks esmtp.biz. 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
Each URL's status is its verdict over the last 90 days, the same one its own page headlines.