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Setting up ptr records for mail froms

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  • Setting up ptr records for mail froms

    I am having frequent 450 4.7.1 Client host rejected: cannot find your hostname to

    domains like yahoo, gmail and etc. We don't have a PTR configured at the ISPs

    end. The ISP doesnt have the infrastructure to that yet.

    The fact is that, the ISP is also a new partner company. We have the ISPs bigger

    router on premises. How can we install a public DNS on the ISPs network to

    advertise the PTR records for our exchange server? Can we

    achieve this by using Windows Server 2008's DNS Role?. Thanks.
    Last edited by nukunu; 13th July 2011, 17:09. Reason: Typing error

  • #2
    Re: Setting up ptr records for mail froms

    If your ISP can't handle a request to include a ptr record he probably doesn't have a DNS at all.

    Question comes into mind who is handling your DNS domain then?

    You have to find the provider who handles your A and MX record right now, he should be able to include a ptr as well.

    To answer your last question sure, Windows 2008 DNS is more then capabale to provide DNS services.

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    • #3
      Re: Problem Setting up PTR Records for Exchange

      Originally posted by nukunu View Post
      I am having frequent 450 4.7.1 Client host rejected: cannot find your hostname to

      domains like yahoo, gmail and etc. We don't have a PTR configured at the ISPs

      end. The ISP doesnt have the infrastructure to that yet.

      The fact is that, the ISP is also a new partner company. We have the ISPs bigger

      router on premises. How can we install a public DNS on the ISPs network to

      advertise the PTR records for our exchange server? Can we

      achieve this by using Windows Server 2008's DNS Role?. Thanks.
      Your ISP has to create the PTR record as they own the subnet. Your domain registrar will be of no help with this as they can only create A records MX records etc.
      ALL ISP's should have the ability to create reverse records and propagate this in DNS. If they cannot then it's time to get a new service provider.

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