Help with rDNS

My CWP7 is failing emails to outlook/microsoft, my rDNS is failing, someone can help me how I can update my rDNS?

I'll attach a image, number 1 and 2 is domains from website, is ok
but the main domain where I use to access the CWP7 (I have a exclusive domain for access cwp7) DKIM is not activade, I dont know if this is a problem.

When I use tests email, show rDNS failing.

How I can update my rDNS? Please, thanks.

1. On your local PC run:

ping XXX.DOMAIN.COM

where XXX.DOMAIN.COM is the hostname of your server. You should get the primary IP of your server in output.

If you get another IP or nothing then check the DNS zone of your domain and make sure the DNS zone has the A record for XXX.DOMAIN.COM and points it to the correct IP.

2. Access your server over SSH as root and run:

Code: [Select]

telnet localhost 25
The last line of output should show something like:

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220 XXX.DOMAIN.COM ESMTP Postfix
where XXX.DOMAIN.COM is the hostname of your server.

If you get something else then check the mail server config and make sure you specified the correct hostname.

3. Run:

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dig +short -x XXX.XXX.XXX.XXX(XX.XXX.XXX.XXX - the primary IP of your server)

in shell on your server . The output should show the hostname of your server.

Do you get the hostname of your VPS ? If not then contact the datacenter support team where your server is located and ask to update the RDNS for the primary server's IP to XXX.DOMAIN.COM

This is only possible to set in the authoritative server.
You have access to that?

In a VPS server, normally, this is just configured with you provider.
This is yor case?

Regards,
Netino

Hello, yes I have full root access from machine, is a machine in my dedicated, hosted in OVH

Log into your OVH account and you will be able to update the RDNS zone for the IP there. In case you need more detailed instructions then I recommend you to contact OVH to get assistance with their panel.

Correct, rdns or ptr should be done over vps or vm provider instead of control panel