Below is a breakdown of a production-ready config file, followed by an explanation of the critical directives. Sample PowerMTA "Hot" Configuration File
By explicitly defining smtp-source-host , you ensure that PowerMTA binds to the correct local IP. This is vital for multi-IP servers to ensure that the Reverse DNS (rDNS) always matches the IP address being used. Best Practices for Deployment sample powermta configuration file hot
Notice the dkim-sign yes directive. In the modern email landscape, unsigned mail is often discarded immediately. This config assumes you have your private keys mapped, ensuring every outbound packet is authenticated. 3. Optimized Virtual MTAs (vmta) Below is a breakdown of a production-ready config