Powermta Configuration Guide Top _hot_ -

The main configuration file is typically located at /etc/pmta/config . Basic Directives

: Verify that Port 25 is open for outgoing traffic, as many cloud providers block it by default.

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

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

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

: Set a valid FQDN (Fully Qualified Domain Name) using hostnamectl set-hostname mail.yourdomain.com . 2. Core Configuration Essentials