Author Topic: PostFix Setup problems...  (Read 325 times)

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PostFix Setup problems...
« on: December 19, 2018, 01:09:08 PM »
Hello, I'm using centos 7 with cwp and in this step I'm trying to set up PostFix.
In this VPS I will have more than one domain and the main objective is to run mautic.
I am new to the VPS universe so please help haha.

Sorry if I hid something I should not, like I said, I'm new to this universe.
The hostname is pointing to the OVH IP.
RDNS / PTR is also pointing to OVH ip.
But I have this error:

This IP address (ovh ip ex: is associated with the domain (rDNS domain ex:
However, your message appears to be sent by (ex:

You need to change the DNS address (PTR type) and the hostname of your server so that both of them have the same value.

Values ​​tested (examples):
 - IP:
 - HELO:
 - rDNS:

Could anyone guide me in these steps?
« Last Edit: December 19, 2018, 01:25:05 PM by ThiagoHG »

Re: PostFix Setup problems...
« Reply #1 on: December 19, 2018, 06:24:55 PM »
You must set your reverse DNS in OVH.

- Go to your OVH Manager
- Change default reverse name "" to your domain of webserver hostname,
For example: "" and set IP ""

*) Make sure you already set A record for your reverse domain name.

Re: PostFix Setup problems...
« Reply #2 on: January 14, 2019, 01:18:55 PM »
Sorry for the delay to respond and thank you very much!
I'm new to the VPS universe and did not know I had to do this at OVH.
I was able to solve the problem there.

Re: PostFix Setup problems...
« Reply #3 on: January 15, 2019, 08:34:42 AM »
yes, rDNS is a reverse dns for ip address and this can be set only by the ip range owner in your case ovh.
But it also requires that before setup of rDNS that A record at DNS is set for it.
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