Free privacy-first tool
Read the authentication evidence inside an email.
Open an original .eml file to inspect SPF, DKIM, Authentication-Results, ARC, and transport metadata. The message stays on your device.
Local by design
The message is parsed in your browser and never uploaded.
Evidence, not a score
See the exact claims and signature metadata in the headers.
No account required
Inspect a message without creating an account or sharing data.
Choose an .eml message
Processing happens entirely in this browser tab. MailDNS does not upload, store, or transmit the message. Maximum size: 5.0 MB.
Use the “Download original” or “Save as EML” option in your mail client.