I easily login in roundcubemail, but I can’t receive incoming emails, but I can send them myself.
DNS records are configured correctly.
What is your domain name, so that I can help you?
I checked the MX records by digging the domain, and found that your domain is pointing to our Cloudflare cPanel integration, which breaks MX records and subdomains. If you want to receive emails, I suggest to disable the Cloudflare integration entirely from the cPanel and add the domain to Cloudflare directly after some hours.
As I myself did not understand this?
Thank you very much!