Keep Your Information Safe, Private, and Legal
Our website lets you look at your email security from a casual glance to an in-depth scrutiny. It is for people who want to see that their email is working.
Our EmailSentry™ Outlook Add-in lets you know every email you send is safe, private, and legal. It is for people who want to be sure their email is always safe.
The website is free for non-commercial use. Professional and Corporate use requires a Subscription.
New for 2021, you can baseline a batch of addresses and only report on changes to their security settings.
EmailSentry (see info) is a commercial product licensed to companies for their employee use. It checks every recipient, every email, every time. It is an inexpensive, easy, and approved answer to HIPAA, GDPR, CCPA, PCI, and other email security compliance requirements. For many companies, it may be all you need. Sign up for a free trial.
Check Your, or Any, Email System
You are responsible for protecting the email that you send. We recommend you use the TLS encryption already built into your mail system, but you must check the recipient's email too. Ignoring security invites fines, civil and criminal legal action, and unwanted publicity.
Most email systems can encrypt email in compliance with US NIST, HIPAA, HITECH, GDPR, CCPA, PCI DSS, SOX, GLBA, SB1386, SEC 17a-4, NASD3010, FRCP, FINRA, etc. Test yours below.
Check How You Get Email (Receiver Test) FREE
Check How You Send Email (Sender Test) FREE
How you send email is more important than how you get email. When you send data via email, you are responsible for securing it until it gets delivered to the other side. If you email protected information, such as information subject to HIPAA, GDPR, or PCI, you must make sure the email is encrypted.
If the button does not work for you, or for more information about this test, use the menu choice or see the documentation at TestSender.
How Did You Do?
If either test shows any problems with your email, this site can help you find and fix them. See How To Use CheckTLS to get started.
If the two tests above, ("TestReceiver") and ("TestSender"), show that your email can do the necessary encryption, then you have everything you need to meet your email transport security requirements and legal liabilities. See Secure Email Compliance Is Easy below for how to use what you have.
Show Your SSL Version Widget
(we do not keep your address)
Put Our Widgets On Your Site
Put the above TLS Version checker, or the "Get" and "Send" tests further above, or any other CheckTLS test, on your own site. We make the source code for widgets like these available for you to customize and build into your site.
Secure Email Compliance Is Easy
The tests show that your email can do proper email encryption. For compliance, you just have to make sure your email does that encryption on every email.
As long as encryption works on your sending end, and encryption works on the other person's receiving end, then Opportunistic TLS will encrypt and your email is compliant. The test above shows that your end works, and you know to re-test it regularly and especially after you make a change to it.
That leaves the other person's end. How can you be sure that their end is "encryption ready" every time you send to it? Do that by testing the other person's end regularly (e.g. daily), or, better yet, on every email with the CheckTLS Outlook Add-in.
See Secure Email Compliance for more information. You don't need to buy any hardware or pay for an online service: your email already has everything you need! And if you already have hardware or an online service, CheckTLS is an easy way to regularly check that it's working, and help you enforce your SLAs.
Secure Email Compliance In Outlook
EmailSentry puts CheckTLS email compliance (HIPAA, GDPR, CCPA, PCI-DSS, etc.) into Outlook. No technical knowledge required. No extra steps, equipment, or changes to your network.
The Red Arrow
Email has three parts: your end, their end, and the Internet in the middle. You control your end, they control their end, but that middle part is "uncontrolled".
CheckTLS is about the red parts of the picture. We help you secure and test the parts of your email system that touch the Internet. Many places ignore these areas because it's too hard, or they don't know how to get started.
And no matter how sophisticated your Internet touching systems are, they should be verified and regularly tested.
No matter your security level, this site will help.
Yes, There is More
And, back to the Red Arrow. We realize that your part, your green arrow above, has data encryption at rest, data retention, data protection, data destruction, and other ramifications.
We are just about the Red Arrow, but we do it better than anyone else. CheckTLS is the only site that can:
- test how you send email ()
- test TLS v1.3 email: we use it in and out, and we can test it in and out
- test IPv6 email: we use it in and we can test it in and out
- test live SPF, DKIM, DMARC
- test live MTA-STS, SMTP TLS Reporting, DANE
- test and limit to specific TLS versions, cipher suites, etc. (sender and receiver)
- test Mandatory TLS
- call our tests in your code CheckTLS API
- re-brand and run our tests on your website Embed CheckTLS
- do fail-safe email monitoring Email Monitoring
- save tests and run them on a schedule Batch Testing
CheckTLS email works with TLS 1.3, as do most of our tests.
Test TLS 1.3 on our email to see how it works. Compare the results with tests on your site.
Transport Layer Security (TLS) is the most important piece of email transport security, so this new version is very important to us and to our clients. We cover email broadly and deeply, so this new version affects much of our tests and tools. We are continuing to add TLS 1.3 probes, discovery, and reporting to our site. We welcome feedback, suggestions, and reports for what parts of our site could benefit from adding or enhancing TLS 1.3 support. Contact Us
We are part of the security policies and operations of some very large and prestigious financial institutions, health care systems, insurance companies, and law firms. Why? Two reasons: our tests work, and we save them money!
Secure Your Company Email
You can use CheckTLS instead of expensive email appliances or on-line email services to meet internal security requirements, contractual security requirements, and government security requirements. One less moving part in your email chain and one less expense. Our tests are a very inexpensive answer to PHI (HIPAA/HITEST), GDPR, PCI-DSS, PII, US NIST requirements.
If you already have extra in-line or on-line email security, CheckTLS can verify they're working and monitor them to be sure they keep working. A few extra bucks a month to make sure all that sophisticated stuff is working.
Protect Your Company from Your Business Partners
Use CheckTLS to make sure your trading partners are secure enough to do business with you. As part of your new vendor and new customer process, verify that their email scores a Confidence Factor℠ of 90 or above on our ("TestReceiver") test.
Whether you are a small shop that needs something simple and low cost, a medium business that needs to beef up security to meet increasing scrutiny by your trading partners, or an enterprise organization that wants some oversight of many security facets, CheckTLS can solve many of your security challenges faster, easier, and at significantly less cost.
Our tests are non-invasive, non-intrusive, and non-obtrusive. They require no changes to your or any other system. They cause no extra processing and should not trip any security alarms.
Our tests are simple, open, and proven. For six years we have been doing over a million tests a year. We research all questionable results, and we welcome feedback and suggestions. You can turn up the detail and audit everything we do.
- Email security at low cost, easy install, no risk
- Safeguard "Protected" information: PHI, PCI, PII, etc.
- Comply with HIPAA/HITECH, GDPR, PCI-DSS, NIST
- Monitor your email from the Internet
- Add regular, independent verification to your Security Policy
- No changes to your email: no devices or routing
- Good first step into email security
- Good next step no matter how advanced your security devices and services
- Demonstrates effort and consideration of security
- We can help with your security designs and documentation
Business Users Have Priority
- Run tests faster and at a higher priority
- Program multiple tests, save them, and run them on a schedule
- Monitor CheckTLS and your email (fail-safe monitoring)
- Add custom test and/or monitor icons on your desktop or your phone
- Use the CheckTLS API to automate testing and interface with your IT
- Receive unlimited support
- Meet requirements for Protected Information (PHI, PCI, PII, NIST, etc.)
- Assistance and sample language for HIPAA/GDPR and other compliance
Sleep better knowing someone else is watching over your email.