Cloudflare doesn’t proxy email, so email-related hostnames need to be set to . Your ‘mail’ DNS record needs to be set to .
Since it sounds like you’re hosting email and a website on the same server, you can’t hide your web server’s IP address because that same IP address is for email.
Thanks for the reply. But It doesn’t seems to b working from my side. I am able to use TLS mode to send and receive emails but I want to use it with SSL mode.