Email Hosting Providers

SPFSPF

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.

DMARCDMARC

DMARC Usage Statistics · Download List of All Websites using DMARC

A technical specification created by a group of organizations that want to help reduce the potential for email-based abuse

DMARC

SSL Certificates

SSL by DefaultSSL by Default

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.

HSTSHSTS

HSTS Usage Statistics · Download List of All Websites using HSTS

Forces browsers to only communicate with the site using HTTPS.

Operating Systems and Servers

DebianDebian

Debian Usage Statistics · Download List of All Websites using Debian

Debian is a free operating system (OS) for your computer.

Web Servers

ApacheApache

Apache Usage Statistics · Download List of All Websites using Apache

Apache has been the most popular web server on the Internet since April 1996.

Communi Gate ProCommuni Gate Pro

Communi Gate Pro Usage Statistics · Download List of All Websites using Communi Gate Pro

Based on open standards, CommuniGate Pro provides an integrated platform for Store-and-Forward (E-mail, Calendaring) and Real-Time (VoIP, Video, Instant Messaging, White Boards) communications over IPv4 and IPv6 networks.