NOTE: You must create your domain within DNS Made Easy using the exact same syntax your ISP or hosting provider used to delegate it. If your IP block is smaller than a class C then your zone might look like this “27/1.” or “0-25.1.”. Meaning this reverse DNS zone would handle the reverse DNS for IPs 192.168.1.1 to 192.168.1.256. So “1.” would be the reverse DNS for the 192.168.1 class C. The numbers that precede the “in-addr.arpa” are actually your IP block with the octets reversed. This zone is actually a special reverse DNS domain that ends in “in-addr.arpa”. NOTE: You can determine the owner of an IP address by performing a WHOIS search on the IP in question using this free tool.Ĭontact your ISP (or whoever owns your IP block) and request a zone for your mail server’s IP address. You will need to find out who owns your IP block (usually this is your ISP or hosting provider). Create a PTR record within your reverse DNS domain.įirst, you need to obtain the IP address of your mail server.Create your reverse DNS domain in DNS Made Easy.Then request delegation of your reverse DNS to DNS Made Easy name servers where you are provided with your reverse DNS domain.Contact your IP provider to request your IP’s reverse DNS zone.This tutorial will guide you through setting up reverse DNS in DNS Made Easy. Note: Reverse DNS is supported for both IPv4 and IPv6. Basically, this record tells other mail servers that the IP of your mail server is authoritative for sending and receiving mail for your domain. Reverse DNS lookups are conducted by mail servers to make sure that the other mail server they are dealing with is who they say they are. Reverse DNS (rDNS) is the method of resolving an IP address into a domain name, as opposed to resolving a domain name into an associated IP address as you would with a traditional DNS lookup.
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