Reverse DNS (PTR) Checker

Enter the IP address of your mail server to check PTR record
💡 Why is Reverse DNS Important?

Reverse DNS (PTR record) maps an IP address back to a domain name. For mail servers:

  • Many mail servers reject email if PTR is missing
  • PTR should match the HELO/EHLO hostname your server uses
  • Forward DNS (A record) should point back to the same IP
  • Properly configured PTR improves email deliverability and reputation