Do I need to change rDNS or not?
Hi all,
I need some help, I have been advised that I need to change the rDNS to match it with the smtp banner as they both are not matching. On my main server, the rDNS is: server.mydomain.com. It's pointing to the IP 104.xxx.xxx.xx. It is the same for mail.mydomain.com which is also pointing to the IP 104.xxx.xxx.xx as I have added the A record. When I send the email it will show mail.mydomain.com, so the rDNS (server.mydomain.com) and the mail domain (mail.mydomain.com) is not matching. I am not sure if I do I need to change the rDNS or not?
How I can find out what is my smtp banner?
If I do need to change the rDNS, do I need to change the rDNS from server.mydomain.com to smtp.mydomain.com or mail.mydomain.com?
If I change the rDNS from my hosting provider panel, do I need to change the cpanel hostname as well or not?
Any advice would be much appreciated.
Thanks in advance.
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We personally recommend checking the /etc/mailhelo file you may need to check exim settings to make sure all users use the same banner 0 -
You can go to mail-tester.com and send an email to the email address you see in mail-tester.com, then follow the instruction there. You will be provided with some recommendations regarding your email deliverability issues, including the rDNS. 0 -
In the majority of cases, the PTR should match the hostname of the server, and the contents of /etc/mailhelo should match what is set for the PTR record. All of these should reference the same host. 0 -
Thanks for the advice guys, I have checking on /etc/mailhelo and it show empty so what I need to do? I sent an test email on mail-tester.com and the rDNS is server.mydomain.com Here is the details: - HELO: server.mydomain.com
- rDNS: server.mydomain.com
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We personally recommend checking the /etc/mailhelo file you may need to check exim settings to make sure all users use the same banner
I have checking on /etc/mailhelo file and it show as empty. So when I sent the mail-tester email it show:- HELO: server.mydomain.com
- rDNS: server.mydomain.com
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In the majority of cases, the PTR should match the hostname of the server, and the contents of /etc/mailhelo should match what is set for the PTR record. All of these should reference the same host.
Can you please be more clarify please? I dont understand what you mean the PTR should match the hostname of the server? you mean my cpanel hostname or what?0 -
I have checking on /etc/mailhelo file and it show as empty. So when I sent the mail-tester email it show:
- HELO: server.mydomain.com
- rDNS: server.mydomain.com
If your host is server.mydomain.com, your /etc/mailhelo file should contain something similar to "*: server.mydomain.com" Then point your Rdns to server.mydomain.com, after entering your rdns, run the command "host your_ip" and verify it has something like "X.X.X.X.in-addr.arpa domain name pointer server.mydomain.com".0 -
If your host is server.mydomain.com, your /etc/mailhelo file should contain something similar to "*: server.mydomain.com" Then point your Rdns to server.mydomain.com, after entering your rdns, run the command "host your_ip" and verify it has something like "X.X.X.X.in-addr.arpa domain name pointer server.mydomain.com".
Well I want to use something is like smtp.mydomain.com. Is it recommended to use smtp.mydomain.com instead of server.mydomain.com when I change in rdns and mailhelo as well? When I change rdns and mailhelo, do I have to change my cpanel hostname or not? I want to use server.mydomain.com as cpanel host name while use smtp.mydomain.com as the rdns so I can use it for send and receive my emails.0 -
@cPanelLauren i am waiting for your answer 0 -
The best way to do this would be to have all of the sources match. If you're wanting to use smtp.domain.tld then I'd suggest 1. assigning a specific IP for this 2. adding a ptr record for smtp.domain.tld 3. use the following to configure this for /etc/mailips and /etc/mailhelo How to Configure the Exim Outgoing IP Address | cPanel & WHM Documentation But this is pretty complicated and requires maintenance. 0 -
The second configuration I noted Would imply that you did not want to change your hostname to match.
Ok, to be clear. In the second configuration you noted, do I have to change the PTR record in my hosting provider panel? If so, wont I have to change my cpanel hostname?0 -
IF your provider allows you to do this, otherwise you'll need to contact them to have it updated. 0 -
IF your provider allows you to do this, otherwise you'll need to contact them to have it updated.
I have already updated the rDNS so I will need to wait until 24 hours for fully propagate. So do i need to change in the helo as well? if so how i can do that?0
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