proxmox mail gateway relay port 26 configuration

Building a 3-Server Mail Platform with Rspamd, Proxmox Mail Gateway, and MailLab (Roundcube, DKIM, Fail2Ban)

Tested on: Ubuntu 22.04/24.04, Proxmox Mail Gateway 8.2 What You Will Build Inbound flow: Gmail (or the Internet) → Rspamd[…]