I recently setup Cyberpanel on VPS. and having issue with emails that I cannot send and receive any e-mails. Does anyone know why? I have set up DNS with Cloudflare. See logs:
Thank you @Dreamer for taking time to review my issue. I have followed the instruction and changed to inet_protocols = ipv4 (previously setting was inet_protocols = all) and restart the postfix.
Now it’s showing “Job for postfix.service failed because the control process exited with error code. See “systemctl status postfix.service” and “journalctl -xe” for details”