What is Reverse DNS (rDNS)- Reverse DNS Lookup

Written by Julia G

There are many ways to prevent spam, such as implementing SPF, DKIM, DMARC, and BIMI. But lesser-known forms of email authentication including reverse DNS (Domain Name System) are equally as important. So, what is reverse DNS or an rDNS lookup? Reverse DNS (rDNS) is essentially a reverse IP lookup. It is a type of email authentication that is used to …