Instead of writing everything in one place, add links to external files inside /etc/pmta/config :
When you install PowerMTA on a Linux system, the software automatically establishes a default file path. /etc/pmta/config
So what does mean in practice? It encompasses several strategies for managing large, complex PMTA configurations: powermta config file link
pmta configtest
<source 127.0.0.1> process-x-forwarded-for yes </source> Instead of writing everything in one place, add
<domain-domA> domain example.com dkim-selector default dkim-private-key-file /etc/pmta/dkim/example.com.private pool pool-domA source-host mail.example.com max-msg 5000 max-simultaneous 20 throttle 100/s </domain-domA>
# domains/gmail.com.conf <domain gmail.com> max-outgoing-connections 20 max-messages-per-connection 100 bounce-handler gmail-bounce </domain> CircleID Tips Best Practices for Deployment How to
Essential tips for optimizing server resources and managing invalid domains. CircleID Tips Best Practices for Deployment How to Install & Setup PowerMTA on CentOS 7 20 Jan 2023 —
If that chain breaks (e.g., a typo in an include path), PowerMTA will either fail to start or, worse, fail to deliver mail silently.