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The Forward/Reverse DNS tool checks a domain or IP address for proper PTR setup
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| Forward / Reverse DNS Test |
Forward Confirmed Reverse DNS, is when an IP address has both forward (name -> IP) and reverse (IP -> name) DNS entries that match each other.
Most mail servers deny delivery of email messages if Forward and Reverse DNS is not setup properly for your sending domain.
Some e-mail mail transfer agents will perform Forward / Reverse DNS verification on the domain name given on the SMTP HELO and EHLO commands.
Use this tool to verify the domain you are mailing from is configured properly, so that you can increase your email delivery rates.
A Forward / Reverse DNS verification can create a weak form of authentication that there is a valid relationship between the owner of a domain name and the owner of the network that has been given an IP address. While weak, this authentication is strong enough that it can be used for whitelisting purposes because spammers and phishers can not usually by-pass this verification when they use zombie computers to forge the domains.
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