Post Category: Email Infrastructure / MTA Tuning Reading Time: ~12 minutes
relay_host smarthost.example.com
relay_auth
username "your_username"
password "your_password"
smtp-greeting "ESMTP Service Ready"
By mastering these top configuration settings, you transform PowerMTA from a simple mailer into a robust, high-performance delivery engine capable of handling enterprise-level volume while maintaining pristine sender reputation. powermta configuration guide top