This is all wrong. What you are trying to do is impossible. Check the documentation you can only handle email delivery though zoho or cyberpanel choose one - Configure Email Delivery - Zoho Mail Setup
if you have set up local email delivery settings in your previous host, the emails sent from your previous email server will be delivered internally, and will not be delivered to your Zoho mail accounts.
Follow this guide to setup Achieve 10/10 Email score with CyberPanel! you need to setup rDNS ptr record for your mailserver etc. If you ran into issues kindly revert back here.
This is configured properly, Kindly gothrough the first conversation, I have shared the screenshot of rDNS is properly configured, But in mail-tester.com, It says no rDNS configured.
It was working properly before. we received the emails before.
I think this issue cause after update to latest version.
Honestly this is wrong. This is why you are getting errors during mail test here Email rejected by Zoho mail. If you read the rDNS error during mail test itself it states that your email was sent from domain.com not maildomain.com. You need to fix this