Hi, dear masters I having issue with my rDNS which are showing rDNS/PTR = FAILED

I have attached a screen shot for further help and kindly guide me on how can resolve this issue.

Postfix Mail Server Manager

Rebuild your mail server with Amavisd, Spamassassin, ClamAV (AntiSpam and AntiVirus Protection)
Hostname needs to have a valid A record and rDNS/PTR set for successful email delivery.
**Reject the request when the hostname in the client HELO (EHLO) command has no DNS A or MX record. The unknown_hostname_reject_code specifies the response code to rejected requests (default: 450).

Your Hostname is: cloud.signalprime.com and it resolves to IP: ; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.16 <<>> A cloud.signalprime.com +short @8.8.8.8 ;; global options: +cmd ;; connection timed out; no servers could be reached [Check Black List]
rDNS/PTR = FAILED, check with your hosting provider!FAILED[Check SenderBase]

rDNS/PTR check for IP 116.202.219.107 = ; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.16 <<>> -x 116.202.219.107 +short @8.8.8.8;; global options: +cmd;; connection timed out; no servers could be reached
rDNS/PTR check for IP 116.202.219.96 = ; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.16 <<>> -x 116.202.219.96 +short @8.8.8.8;; global options: +cmd;; connection timed out; no servers could be reached

kindly guide me please

thanks.

Hi ensure port 53 is opened tcp and udp

3 hours ago, Sandeep B. said:

Hi ensure port 53 is opened tcp and udp

Hi, thank you dear sandeep for your time and efforts to resolve our issue it’s to much worthy for us indeed.

yes the 53 port is sat correctly to open in all mood tcp and udp

waiting for further solution please

thank you.

i would sayt that the server lacks a recursive DNS record. Does it have a public IP and a PTR`?

4 hours ago, leisegang said:

i would sayt that the server lacks a recursive DNS record. Does it have a public IP and a PTR`?

Hi, thank you very much, yes it does, everything was good 3 days before, but suddenly it seem issue in rdns

kindly guide me what if I setup new server by alma9 but I’m not sure CWP support alma 9?

what is the solution

thank you