Free Tool

Email Diagnostics

Analyze SPF, DKIM, DMARC, MX, PTR, Blacklist, SMTP Banner, EHLO, Open Relay and TLS:25|465.

// Domain data

Without "www" or "https://". Ex: alstrzwag.com

5 + 6 =

This diagnostic exposes sensitive data.
Confirm domain ownership to view values.
Testing is only allowed from your local network.
Create the file /rjpdns.html in the site root with content:
email-diagnostics:38510899350234682