Reverse DNS lookup

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  • leg4
    Confirmed User
    • May 2003
    • 4429
    #1

    Reverse DNS lookup

    How important do you guys think it is to have a Reverse DNS record setup on your server?


    Does this help at all for e-mail delivery? or SEO purposes?
    >>> Contact me here

    email me here
    Tags: None
    • BIGTYMER
      Junior Achiever
      • Nov 2004
      • 17066
      #2
      If I don't have it setup tons of emails get rejected.

        Comment

        • SASCH
          Confirmed User
          • Jul 2011
          • 107
          #3
          Required for mail delivery.
          Account no longer in use.

            Comment

            • baddog
              So Fucking Banned
              • Apr 2001
              • 107089
              #4
              ^What he said.^

                Comment

                • leg4
                  Confirmed User
                  • May 2003
                  • 4429
                  #5
                  Thanks guys, I think I knew the answer to this question already...

                  But I needed to hear it from other people in the business that I respect.


                  Thanks again.
                  >>> Contact me here

                  email me here

                    Comment

                    • cooldude7
                      Confirmed User
                      • Nov 2009
                      • 4306
                      #6
                      this is new for me.,

                        Comment

                        • AdultEUhost
                          ORLY?
                          • Oct 2005
                          • 2579
                          #7
                          often forgotten but actually very important to setup
                          make sure that the hostname in the PTR record also points to that IP by an A record
                          ICQ: 267-443-722 / leon [at] adulteuhost [dotcom]

                          Nominated for an XBIZ Award as "Webhost of the Year" in 2007, 2012, 2013 and 2014

                            Comment

                            • leg4
                              Confirmed User
                              • May 2003
                              • 4429
                              #8
                              Originally posted by AdultEUhost
                              often forgotten but actually very important to setup
                              make sure that the hostname in the PTR record also points to that IP by an A record
                              How could we check this? To make sure this A record has been setup?
                              >>> Contact me here

                              email me here

                                Comment

                                • rowan
                                  Too lazy to set a custom title
                                  • Mar 2002
                                  • 17393
                                  #9
                                  Originally posted by leg4
                                  How could we check this? To make sure this A record has been setup?
                                  Do a reverse lookup of your IP, then a forward lookup of the hostname the previous lookup returned.

                                  x.x.x.x -> 1234.somehost.com (reverse lookup)
                                  1234.somehost.com -> x.x.x.x (forward lookup)

                                  Check that both the IP and hostname are the same in both queries.

                                    Comment

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