Don’t recommend that. You may expose your IPs or other data accidentally. Replace actual info with fake one and ask your question.
The problem of exposing IP usually happens when you run your mail server on the same machine of your website. That is the common case with CPanel and the solution is to use external email service providers of using a separate machine as email server (in latter case Cloudflare doesn’t protect that machine but at least any attack on that machine doesn’t affect your website).