rDNS/PTR = FAILED (Postfix Mail Server Manager)

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.