I have 2 DNS Severs : ns1.host.com = HostIP1 ns2.host.com = HostIP2 when i do reverse lookup i get: ns1.host.com -> HostIP1 ns2.host.com -> HostIP2 So far so good ! Now i add clients and point the client to host name server, add A records and all everything works fine. When i do a reverse check on client.com using mxtoolbox i get error: Invalid SuperTool Syntax Invalid Input. ptr requires a IP Address and client.com is a Fully Qualified Domain Name. Should ptr records be created for all clients as well ?
That is not reverse lookup. Reverse is when input IP-address and get the host name. My quess is MXtoolbox complains about the mail server IP-address not having PTR record.
Thanks ! Redone test with ip and i get HostIP1 -> ns1.host.com HostIP2 -> ns2.host.com I have no PTR Records setup do need to set it up for my host domain and clients domain ?
There may be some confusion about what is a PTR record. There is tutorial: https://www.howtoforge.com/tutorial/setting-up-your-own-name-service-with-ispconfig/ You should create PTR record for you mail servers IP-address. For other hosts it is not that important usually.
Hi thanks for the link i have read it through and have some questions. The reason that i looked into the reverse ip is because i am having some mail server issues : [Reverse IP].in-addr.arpa points to ns1.host.com and not mail.host.com The article says i must create new zone if my ip was [octets1].[octets2].[octets3].[octets4] then i create SOA [octets3].[octets2].[octets1].in-addr.arpa NS [octets3].[octets2].[octets1].in-addr.arpa ns1.host.com PTR [octets4] mail.host.com my ns1.host.com and mail.host.com uses the same ip ?
The tutorial tells how to create a zone for reverse DNS, but also says this works only inside your own local area network using RFC 1918 IP-addresses. So don't care about that if your mail server should be acceccible from the public Internet. There is a question mark in the end, but the sentence is a statement. Could you formulate that as a question or remove the question mark. To get the PTR record for your mail server IP-address to point to your mail server hostname, contact the party that gave you that IP-number. Ask them to fix the PTR record.
Both ns1.host.com and mail.host.com can have the same ip address (A record, a forward lookup); the ip address itself can only resolve to a single name (PTR record, a reverse lookup). Make sure the name obtained from a reverse lookup has an A record pointing to that ip (forward confirmed reverse dns lookup - ie. the two match). You will have delivery problems to some mail systems without forward confirmed reverse lookups. You can have better mail delivery if the PTR points to the same name you use in your MX records, and your mail server identifies itself with that name (eg. mail.host.com). That's the key, your server is probably not involved in handling reverse DNS if you only have a single ip address. But it could be, you just need to check with your ISP/VPS provider/whomever assigned you the ip address(es).
Jesse is correct. Keeping this as uncomlicated an answer as possible, your ISP will handle reverse lookups, as the IPs are actually still with the ISP. Contact them and ask them to create reverse lookups for the IPs you are using and all will work just fine. We have a C block of IPs and the ISP handles numerous reverse entries for us.
