Below is a concise, production-ready example PowerMTA (PMTA) configuration focused on "hot" (high-throughput, reputation-conscious) email delivery. It includes global settings, listener(s), virtual MTAs, smart host routing, per-IP and per-domain throttling, bounce handling, and feedback loop/dkim/spf basics. Adjust names, IPs, domain, credentials, and limits for your environment.
<feedback-loop yahoo_fbl> destination-email postmaster@lifestyle-bureau.com vmta ent-flash loop-type spam </feedback-loop> sample powermta configuration file hot
A standard high-performance PowerMTA configuration is built around several key directives: Virtual MTAs and IP Pooling
5 Key PowerMTA Configuration Tips for Optimal Performance - Bird smart host routing