SSL Cert Update Issues with Mail Server

I'm running into a recurring issue on my CWP setup where every time my SSL certificate gets updated, my mail server starts acting up and throws certificate errors. I end up having to manually rebuild the mail server to get everything running smoothly again, which is becoming quite a hassle.

Has anyone else faced this? How are you all managing SSL cert renewals for your mail servers? Any scripts or settings that you could share would be a huge help.

Looking forward to some tips or guidance on how to automate this process a bit more, so I don’t have to keep doing everything manually.

Cheers!

Could you please advise of the following:

What 'errors' and/or 'messages' are being displayed or from logs?

What distro are you trying to install CWP onto? / What distro are you are you running CWP on?

Public or NAT?

Could you please advise of the following:

What 'errors' and/or 'messages' are being displayed or from logs?

What distro are you trying to install CWP onto? / What distro are you are you running CWP on?

Public or NAT?

I have the same error on Centos 7 server and Centos 8 Stream.
Im running with public IP.
Where can I find relevant error logs? Since the problem when this occurs is on client side, the email client fire an error telling that the certificate is insecure.