|  | What is reverse DNS?The primary purpose of the DNS system is to convert domain names such as example.com to numeric strings such as 1.2.3.4. Reverse DNS, as the name suggests, works in the opposite direction: numeric strings such as 1.2.3.4 are converted to domain names such as example.com. The information from a forward and reverse DNS lookup should match.
Properly configured reverse DNS is important for deliverability because AOL and other ISPs may reject messages lacking proper reverse DNS records.
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