I don’t receive emails
The client email provider says
error dialing remote address: dial tcp
18.104.22.168:0->22.214.171.124:25: i/o timeout
My email provider says that Cloudflare is blocking this email.
I have checked the DNS configuration on Cloudflare and it seems to be OK. Besides my test emails are beeing sent correctly, so I am not sure why Cloudflare sometimes rejects emails.