DMARC alignment checker
Compare header domains under relaxed or strict alignment.
Your inputs stay in this browser. No account needed.
Your result
Add your inputs, or try the example, to see your result here.
A domain match does not mean SPF or DKIM cryptographic checks passed; headers can be forged.
How to use this tool
- Extracts visible From, Return-Path and DKIM signing domains.
What the result tells you
- A domain match does not mean SPF or DKIM cryptographic checks passed; headers can be forged.