Checks whether the sending IP is authorized by the envelope sender domain.
Email diagnostics
Email header analyzer
Paste raw message headers to unpack SPF, DKIM, DMARC, delivery hops and common message metadata locally on this request.
Quick guide
Reading raw email headers
Mail systems add headers as a message moves between servers. Authentication-Results records what a receiving system concluded about SPF, DKIM and DMARC, while Received headers show the delivery path in reverse chronological order.
A pass result means the receiving system reported that check as passing for that message. It is not a guarantee that the message itself is trustworthy, and forwarded mail can legitimately produce more complicated authentication results.
Verifies a cryptographic signature using a public key published in DNS.
Applies domain alignment and policy on top of SPF and/or DKIM.
Raw message headers are unfolded and parsed locally for common authentication results, Received hops and message metadata. The pasted header is not placed in the URL.
- Tracing how a message travelled
- Reading SPF, DKIM and DMARC results
- Finding the DKIM signing domain and selector