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Reverse DNS Lookup (rDNS)
Perform reverse DNS lookups to find the hostname associated with an IP address. Essential for email server verification and security analysis.
Try:
What this tool checks
Use this to verify PTR records and confirm forward DNS matches the same IP.
- PTR record presence for the IP address
- Forward lookup match to validate configuration
- Mail server hints tied to the hostname
How to read the results
A valid PTR record that resolves back to the same IP means the sender is configured correctly.
- Mismatch means forward DNS does not point back
- No rDNS often causes inbox providers to block mail
- Update PTR records through your hosting provider
FAQ
Short, practical answers to common questions.