Email header analyzer
Paste raw message headers to inspect authentication results, routing, and delivery delays.
How it works
Read the path behind a message
Email headers record how a message moved between servers and how receiving systems evaluated SPF, DKIM, and DMARC. This tool parses the pasted text locally in your browser.
- Trace Received headers in chronological order
- Inspect SPF, DKIM, and DMARC results
- Compare delay between mail servers
- Review sender and message metadata
Use these checks during signup
The API returns allow, review, or block with the reasons behind it.