Issue Possible problem with PTR

[Marcosrijo]

I have Plesk Onix with two IP and two sites, one IP for each site. One of the emails returns with the following error:

Diagnostic-Code: smtp; 550-"JunkMail rejected - ip206.ip-144-217-101.net
    (procode.com.uy) 550-[144.217.101.206]:51978 is in an RBL on
    550-csi.cloudmark.com/reset-request/?ip=144.217.101.206 , see Poor
    Reputation 550 Sender"

The main site Procode IP 144.217.87.174 and the other, adrianareyespropiedades.com IP 144.217.101.206.
But the second emails come with the name of the main domain and if I analyze it in Mail-tester.com I get that:

Your IP address 144.217.101.206 is associated with the domain ip206.ip-144-217-101.net.
However, your email seems to have been sent from procode.com.uy.

You may want to change your DNS pointer entry (PTR type) and the host name of your server to the same value.

Here are the values tested for this test:

IP: 144.217.101.206
HELO: procode.com.uy
rDNS: ip206.ip-144-217-101.net

Do you have any idea what can happen with this that you do not configure?

 

[AYamshanov]

Hi Marcosrijo,

Looks like you are using OVH; in this case, you need to change PTR record in OVH personal account.

 

[Marcosrijo]

Thank you very much AYamshanov !! Now contact OVH support to see where to configure the PTRs
When the solution is effective I share it here in case it happens to someone else