I'm unable to identify the problem with my emails

Hello,

I am attempting to set up my server on Cloudflare, and I am aware that it does not serve mail. So I disabled Proxied DNS in Cloudflare for my mail and installed Let's Encrypt SSL on the server side for my mail.

Also, my hosting provider automatically blocks port 25, so I wondered if that could be the problem.

There are my plesk DNS records:
View attachment 271209
Cloudflare DNS:
View attachment 271210

OS version
Ubuntu 22.04
Plesk version
Plesk Obsidian 18.0.44...

I'm unable to identify the problem with my emails