Postfix blocks CloudFlare for frequent requests, how to allow access?

Question

Email

mx record is configured through CloudFlare, respectively, the latter lets traffic through itself.
Due to frequent requests, after a while Postfix stops accepting requests from it, while everything works locally (RoundCube). If you disable CloudFlare for mx recording, everything works too.
I added CloudFlare subnets to mynetworks - it did not help, and it seems to me that this is not entirely correct, since I am not the only one using it.
How to proceed in this case, so that you can easily connect to SMTP and use CloudFlare?

Answer 1

I ordered a separate IP, I pass traffic directly without CloudFlare