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    Email Deliverability / Reverse DNS (PTR) for VPS


    I was wondering if anyone with a VPS and properly configured DKIM and SPF records has successfully managed to avoid getting the Reverse DNS (PTR) error messages similar to the following within Cpanel's Email Deliverability:


    The system uses an alternate HELO of “s111-111-111-111.secureserver.net” when sending mail from the “mydomain.com” domain.

    The system sends this domain’s outgoing mail from a private IP address, “99.999.99.99”. Reverse DNS does not work with private IP addresses because DNS does not store PTR records for them.

    The server may be misconfigured. For more information, contact your system administrator.


    Much appreciated in advance!



    1 REPLY 1

    Re: Email Deliverability / Reverse DNS (PTR) for VPS

    I am having the same problem with my email deliverability.


    I went to cPanel and tried the following which did not work:


    Can you confirm if the /var/cpanel/cpnat file exists on this server? You can check by executing the following command while logged in via SSH (Terminal) as root:

    cat /var/cpanel/cpnat

    If the file exists and is setup properly, the output of the above command should display the private IP address and public IP address on a single line. If it does not exist, run the following command to automatically populate this file with the correct IP addresses:



    Has anyone solved this problem?  

    My emails are not being delivered from my website.  I fixed everything but the part about emails being sent from a private IP address.