SPF Usage Statistics · Download List of All Websites using SPF
The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.
LetsEncrypt Usage Statistics · Download List of All Websites using LetsEncrypt
Let’s Encrypt is a free open Certificate Authority.
Root Authority
SSL by Default Usage Statistics · Download List of All Websites using SSL by Default
The website redirects traffic to an HTTPS/SSL version by default.
HSTS Usage Statistics · Download List of All Websites using HSTS
Forces browsers to only communicate with the site using HTTPS.
Invalid Certificate Dates Usage Statistics · Download List of All Websites using Invalid Certificate Dates
The SSL certificate for this site has expired or is not active yet.
German Server Location Usage Statistics · Download List of All Websites using German Server Location
The web server is located in Germany.
Server Location
nginx Usage Statistics · Download List of All Websites using nginx
nginx [engine x] is a HTTP server and mail proxy server written by Igor Sysoev.
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