TLS, short for Transport Layer Security, is a protocol used for establishing a secure connection between two computers across the Internet. As an email provider we give our clients the best of security options, and TLS is a very important security tool. Our system gives our users the option to use TLS or SSL when connecting their email client (Outlook, Apple Mail, etc) to our incoming and outgoing servers for the purpose of encrypting the connection itself.
This TLS Checker is solely concerned with TLS in relation to the recipient of the email you send (SMTP); specifically whether the recipient's servers supports "Opportunistic TLS". When our servers connect to the recipient's servers, they check to determine if TLS encryption is available. (See: How to Tell Who Supports TLS for Email Transmission).
By entering the domain of someone's email address below and clicking on the check button, you can determine if their inbound email servers are capable of using TLS. If you are using an email provider that enforces the same level of security as we do here at LuxSci then email sent to users in a TLS-supporting domain should be automatically sent over an encrypted connection. This will make it so that your email communications cannot be eavesdropped upon.
Note that secure server-to-server communications should only use TLS v1.0+ (and not SSL v3.0) and should use strong ciphers (see NIST 800-52). This tool indicates domains that have TLS support but which are configured poorly so that they do not provide the option to use this level of encryption.
I am extremely satisfied with your security features and with the extent of knowledge of your support staff. You provide a solid, reliable service and also manage to continue to add more thoughtful features -- all at a reasonable price."
We use your High Volume SMTP service for our automated invoicing and purchase confirmations, so it is a critical part of our business. Your bulk SMTP has been the most reliable and cost effective I have used. The technical and sales support have been timely, efficient, and effective. I highly recommend."
LuxSci has been a pleasure to work with. The level of support we've received from them has been top-notch. From the smallest user issue to complex custom work, LuxSci has delivered service far above what I expected. Best of all, uptime with LuxSci has been 100%."
I just wanted to say thanks to all the great support and sales people I've dealt with from LuxSci. Our website launched this weekend nearly flawlessly and had great help from your support department. Keep up the good work!"
I wanted to congratulate you on your service; the reduction in Spam is incredible, and the speed of delivery is stunning. I am recommending you to all of my friends and associates! You can quote me on that!"