Overview
See at a glance whether any website's domain has SPF, DKIM, and DMARC set up correctly for email deliverability.
Email Health Checker by Beacon is a free, no-signup tool for checking whether a website's domain has its email authentication set up correctly. Click the toolbar icon on any site and it checks that domain for: SPF — confirms which mail servers are allowed to send email for the domain DKIM — checks for a cryptographic signature that proves mail wasn't altered in transit (checked against common selectors) DMARC — confirms there's a policy in place for handling mail that fails these checks A colored badge on the toolbar icon gives you the at-a-glance result (green = all three found, yellow = partial, red = none found), and the popup shows the detail behind each check. Everything runs directly in your browser using public DNS lookups — there's no account, no sign-up, and no data collected. See our full privacy policy for details. Built by Beacon (optinws.com), a deliverability and inbox-monitoring tool for teams that send email and want to know it's actually arriving.
Details
- Version1.0.0
- UpdatedSeptember 7, 2026
- Size19.79KiB
- LanguagesEnglish (United States)
- DeveloperTimothy Michael CantrellWebsite
10141 Throttle Ln Fort Worth, TX 76131-4423 USEmail
eyesontheboat@gmail.comPhone
+1 817-353-8010 - TraderThis developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.
Privacy
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
