Secure Email, Web and Form Solutions         +1 (800) 441-6612
Secure Email,
Web and Form Solutions
Phone: 800-441-6612

Check a Domain's SMTP TLS Support

Domain to Check: 

Please type the text seen in the image, below, into the "Security Code" box.

Security Code:

The security code is the text that you see in the image, above. Use of this code helps us prevent abuse of this form by automated programs.

Summary of TLS

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.

Read: SMTP TLS: All About Secure Email Delivery over TLS

Enforced use of SMTP TLS is one of several methods that LuxSci SecureLine email encryption can use to ensure secure email delivery. See: How SecureLine Works.

About this tool

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 bellow 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.

Starts under $10/mo

"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."

—Kevin Rasmussen, Co-owner, Keo Scientific Ltd.,

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