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Thread: [SOLVED] Undelivered Mail Returned to Sender / no reverse dns mapping

  1. #1
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    Exclamation [SOLVED] Undelivered Mail Returned to Sender / no reverse dns mapping

    Hello,

    I have mail.example.com, all services running smoothly, I'm trying to send to an email but it return the following error:

    > This is the mail system at host mail.example.com.
    >
    > I'm sorry to have to inform you that your message could not
    > be delivered to one or more recipients. It's attached below.
    >
    > For further assistance, please send mail to postmaster.
    >
    > If you do so, please include this problem report. You can
    > delete your own text from the attached returned message.
    >
    > The mail system

    >
    > <recipient@domain.com >: host imp-2.mail.domain.com [213.205.33.249]
    > refused to
    > talk to me: 554 imp-2.mail.domain.com ESMTP server not available if
    > you do
    > not have a reverse dns mappin
    Any suggestion about how do I add the reverse DNS?

    Please note that example.com which is my domain is hosted US and from the Cpanel I updated the MX records...

    Cheers,
    - In a world without walls and fences who needs windows and gates?
    - I am Running Linux.. Finally, my PC is valid & Reliable Hereafter.

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by snake_eyes View Post
    Any suggestion about how do I add the reverse DNS?
    You need to speak to your ISP or hosting provider, they will do that for you.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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    Quote Originally Posted by phoenix View Post
    You need to speak to your ISP or hosting provider, they will do that for you.
    Thank you for you reply, I should call my ISP or my hosting provider! do you have any idea about what they should do? because I have access to the server Web Host Manager WHM

    Cheers,
    - In a world without walls and fences who needs windows and gates?
    - I am Running Linux.. Finally, my PC is valid & Reliable Hereafter.

  4. #4
    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by snake_eyes View Post
    Thank you for you reply, I should call my ISP or my hosting provider! do you have any idea about what they should do? because I have access to the server Web Host Manager WHM
    Yes they should provide you with a reverse DNS, this isn't normally something within the control of an end-user.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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    Quote Originally Posted by phoenix View Post
    Yes they should provide you with a reverse DNS, this isn't normally something within the control of an end-user.
    I've been called the ISP and they said there is nothing to do from their side, we should do this from the hosting side..

    anyway my dns zones are list below, could you please check them if there is something wrong or I missed some one?

    domain.com. NS ns1.lunarpages.com.
    domain.com. NS ns2.lunarpages.com.
    domain.com. A 216.227.214.3
    domain.com. MX 0 mail.domain.com.
    mail A xx.xx.xx.xx
    www CNAME domain.com.
    ftp A 216.227.214.3
    - In a world without walls and fences who needs windows and gates?
    - I am Running Linux.. Finally, my PC is valid & Reliable Hereafter.

  6. #6
    phoenix is offline Zimbra Consultant & Moderator
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    Those DNS records don't contain a reverse DNS pointer. I assume you can do this from whatever you sue to manage your DNS?

    I'd suggest you read details of what a reverse DNS ptr is, to start have a look here:

    How does the Reverse DNS work?

    and you can test it heer (or at many other DNS tests online): Reverse DNS Lookup
    Last edited by phoenix; 12-20-2009 at 12:44 AM.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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    Quote Originally Posted by phoenix View Post
    Those DNS records don't contain a reverse DNS pointer. I assume you can do this from whatever you sue to manage your DNS?

    I'd suggest you read details of what a reverse DNS ptr is, to start have a look here:

    How does the Reverse DNS work?

    and you can test it heer (or at many other DNS tests online): Reverse DNS Lookup
    Thank you for your advice, I add a 2 records into my side zone to be as below:
    domain.com. NS ns1.lunarpages.com.
    domain.com. NS ns2.lunarpages.com.
    domain.com. A 216.227.214.3
    domain.com. MX 0 mail.domain.com.
    mail A xx.xx.xx.xx
    xx.xx.xx.xx PTR mail.domain.com
    mail MX mail.domain.com
    mail A xx.xx.xx.xx
    www CNAME domain.com.
    ftp A 216.227.214.3

    1. Is the above zones are correct
    2. the rDNS should be added in the hosting company or in the ISP? if in the hosting I don't know why it didn't resolve the domain name that I pointed, although I have added since 7 hours.

    So please your advice....
    - In a world without walls and fences who needs windows and gates?
    - I am Running Linux.. Finally, my PC is valid & Reliable Hereafter.

  8. #8
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    Hello,

    I'm reviewing the configuration, and I noticed that there is something not logic, when I run the command the check the reverse DNS it goes automatically to zimbra server so whatever I changed in the cPanel and added records will not effect, (I'm not sure about this scenario)

    So I just wanna ask about the PTR record, if it's should be registered in the ISP side or at my side in the bind9 of the zimbra server it self?
    - In a world without walls and fences who needs windows and gates?
    - I am Running Linux.. Finally, my PC is valid & Reliable Hereafter.

  9. #9
    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by snake_eyes View Post
    So I just wanna ask about the PTR record, if it's should be registered in the ISP side or at my side in the bind9 of the zimbra server it self?
    The reverse pointer record is nothing to do with your local Zimbra server or LAN DNS, it's a reverse pointer for your public IP address and (as I said earlier) it's something the ISP usually has to do.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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    snake_eyes, the rdns has to be setup by your domain hosting provider or specifically the one where your nameservers are pointing. By the setup you have given seems like 'lunarpages'.

    If you want some specific instructions, please feel free to PM me your exact domain config.

    Cheers !

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