Global settings define how PowerMTA operates as a system service. They specify where the application listens for traffic and where it writes its operational data.
# Require incoming application traffic to use TLS smtp-server-tls-certificate /etc/pmta/certs/pmta.crt /etc/pmta/certs/pmta.key allow-starttls yes require-starttls-before-auth yes # Attempt opportunistic outbound TLS for destination domains use-starttls yes require-tls no Use code with caution. Prevent Open Relaying
Major ISPs have strict limits. If you send 10,000 emails to Gmail in one second, you’ll get blocked. You must define "Domain Directives." powermta config file link
Many industry experts also recommend following the principle when building configurations for multiple customers or domains.
This guide explains how to use PowerMTA configuration file links, split your setup for better management, and optimize your delivery infrastructure. 1. Understanding the PowerMTA Config File Link Structure Global settings define how PowerMTA operates as a
# Path to the spool directory spool /var/spool/pmta # Path to the log files log-file /var/log/pmta/pmta.log Use code with caution. 2. IP and Domain Binding (VirtualMTAs)
# General daemon settings run-as-user pmta data-directory /var/spool/pmta log-file /var/log/pmta/pmta.log Use code with caution. 2. SmtpListener (Inbound / Ingestion) Prevent Open Relaying Major ISPs have strict limits
This forces PowerMTA to re-read /etc/pmta/config and process any updated instructions or newly linked files on the fly. 6. Best Practices for Managing PowerMTA Config Links
The main sections of the PowerMTA config file include:
# global log /var/log/pmta/pmta.log
This is invaluable. It prints a single, massive config file showing every link resolved. If a linked file is missing, this command throws a clear error.