Free tool
Email header analyzer
Paste raw headers to inspect routing, timestamps, and authentication results.
Free · No signup · Runs in your browser — nothing uploaded
An email header analyzer reads the technical headers you paste from Gmail, Outlook, or your mail client — delivery path, dates, and SPF/DKIM/DMARC results as reported by the receiver.
This tool does not connect to your inbox. Paste headers only; avoid sharing messages that contain private tokens. For DNS-side SPF/DKIM/DMARC checks, use our domain authentication checker.
Paste headers only. Parsing runs in your browser.
Results
Paste headers or load the sample.
FAQ
How do I view email headers in Gmail?
Open the message, click the three-dot menu, choose “Show original”, and copy the plain header block at the top.
Does this verify my domain DNS?
It shows what the receiving server reported in headers. To inspect published SPF, DKIM, and DMARC records in DNS, use the SPF / DKIM / DMARC checker.
Is header content sent to Piisend?
No. Parsing runs locally in your browser.