Email Tools

Email Security Summary

Check a domain's whole email setup - MX, SPF, DKIM and DMARC - with one overall score.

Not sure what to enter? Try an example: github.com

Free & instant No signup How to use FAQ

Enter a domain to check its MX, SPF, DKIM and DMARC records together and get an overall email security score with the fixes that matter most.

How secure is a domain's email setup?

This summary checks the four pieces that decide whether a domain's email is delivered and protected from spoofing - MX (mail servers), SPF, DKIM and DMARC - and combines them into one email security score with what to fix first.

How to get an email security summary

Enter the domain you send email from in the box above.
Click Get Summary.
Review the score and each check that failed.
Fix them in order: MX, then SPF, then DKIM, then a DMARC policy.

Related checks

Fix SPF with the SPF Checker.
Check DKIM with the DKIM Checker.
Create a DMARC record with the DMARC Record Generator.

JustChecker tracks your complete email security posture continuously and alerts you if anything regresses.

Frequently Asked Questions

Missing or broken SPF, DKIM or DMARC is the most common technical reason. This check shows which of the three is missing so you know what to fix first.

All four parts present and passing. That meets Gmail and Yahoo's sender requirements and makes it much harder for anyone to send fake email as your domain.

Whenever you add a new email or marketing service, and after any DNS move. Changing hosts is a common way to lose email records without noticing.

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