Reverse DNS

Discussion in 'General' started by mrbronz, Mar 10, 2021.

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  1. mrbronz

    mrbronz Member HowtoForge Supporter

    I trying to clear up all the warnings on my server.

    I get the following on my email server

    Reverse DNS does not match SMTP Banner

    How do I fix this
     
  2. Jesse Norell

    Jesse Norell ISPConfig Developer Staff Member ISPConfig Developer

    Set the reverse dns name to match your server's hostname (preferred), or force the use of a specific hostname in smtp greeting to match your reverse dns name.
     
  3. mrbronz

    mrbronz Member HowtoForge Supporter

    How do I do that?
     
  4. Th0m

    Th0m ISPConfig Developer Staff Member ISPConfig Developer

    Make sure your server's hostname is used for the rDNS record of your IP.
     
  5. mrbronz

    mrbronz Member HowtoForge Supporter

    Where is the rDNS record created?
    Is that a recorded the registrar has to create?
     
  6. Th0m

    Th0m ISPConfig Developer Staff Member ISPConfig Developer

    This is usually created with your network provider.
     
  7. mrbronz

    mrbronz Member HowtoForge Supporter

    So just to be sure im asking them to create an rDNS record martin.gregson.me.uk and point it to my email server IP address
     
  8. Th0m

    Th0m ISPConfig Developer Staff Member ISPConfig Developer

    No. Read about rDNS (aka PTR) online.
    Your IP should "point" to the hostname of the mailserver.
     
  9. Taleman

    Taleman Well-Known Member HowtoForge Supporter

    My signature has links to DNS and e-mail tutorials. They explain PTR and why e-mail server needs it.
     
    mrbronz likes this.
  10. mrbronz

    mrbronz Member HowtoForge Supporter

    Thank you!! :)
     

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