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: Define which IPs and ports PMTA should listen on for incoming mail (e.g., smtp-listener 0/0:25 ).

Organize your sending IPs into to separate traffic types (e.g., transactional vs. marketing). powermta configuration guide top

: Set a valid FQDN (Fully Qualified Domain Name) using hostnamectl set-hostname mail.yourdomain.com . 2. Core Configuration Essentials : Define which IPs and ports PMTA should

smtp-source-ip 1.2.3.4 host-name mail1.yourdomain.com Use code with caution. 3. Authentication for 2025 Deliverability PowerMTA: Best Solution for High-Volume Email Delivery powermta configuration guide top