Moletools

Email Header Analyzer

Paste a raw email header to turn its routing and authentication data into a readable diagnostic report.

Private by design: the header is analyzed for this request only and is not saved to the database. Maximum size: 256 KB.

Frequently asked questions

How do I find the raw email header?
Most mail apps call it Show original, View source, or View message headers. Copy the complete header block, especially Received and Authentication-Results.
Does a pass result prove the email is safe?
No. SPF, DKIM, and DMARC help verify sending authorization and domain alignment, but a legitimately authenticated domain can still send malicious mail.
Do you store the header I paste?
No. This version analyzes it in memory for the current request and does not write it to the database.