Our goal is to make secure email better by having it:
- used in more places
- used more often
- always used when needed
To meet that goal, we offer tools and services to help email administrators set up secure email systems, verify and tune them, monitor them, require them to use their security, and watch critical emails go through them. These are the tools we use every day to setup and maintain secure TLS email systems for clients in health care, finance, legal, and government.
We hope you find CheckTLS.com helpful, and we appreciate any feedback.
CheckTLS connections are made to and from IP addresses 220.127.116.11, 113, 114, and 115 for customers who wish to allow our IP addresses through their firewalls.
About the TLS Protocol Itself
TLS (Transport Layer Security) and its predecessor SSL (Secure Sockets Layer) are cryptographic protocols that secure communications over networks such as the Internet. TLS and SSL encrypt the data sent over the network so it is unreadable by anyone but the two ends of the connection.
More information about TLS can be found at: