Reverse DNS

Reverse DNS

WebDynamic™ Web Glossary

The DNS system is sent an IP address, and the domain name is returned. Reverse DNS is used to log incoming traffic by domain name for statistical purposes. It is also used to prevent spam by determining if the e-mail message is coming from the domain name indicated in the message header. Reverse DNS is only an option and not mandatory in a DNS server. Hence some IP addresses cannot be resolved into their domain name.