Sample Powermta: Configuration File Hot
Optimizing for Deliverability: A Guide to the "Hot" PowerMTA Configuration
4. No Feedback Loop Handling
FBLs are mandatory for sending to Yahoo, AOL, and Microsoft. The sample includes feedback-loop . Ensure fbl-handler.php unsubscribes complainants immediately. sample powermta configuration file hot
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 Optimizing for Deliverability: A Guide to the "Hot"
Quick Explanation of “Hot” Settings
| Setting | Purpose |
|---------|---------|
| max-smtp-out / max-msg-rate | Controls sending speed per ISP (Hotmail, Gmail, Yahoo). |
| smtp-starttls required | Forces TLS for better deliverability. |
| dkim-sign yes | Adds DKIM signature to avoid spam folders. |
| bounce-handler / fbl-handler | Handles bounces and abuse complaints automatically. |
| dns-servers 8.8.8.8 | Fast, reliable DNS for MX lookups. |
| use-rs | Enables recipient verification (RSET before DATA). | Ensure fbl-handler
A "hot" or production-ready configuration typically includes the following sections to ensure high deliverability and security: PowerMTA Multiple Virtual PMTA config file sample
Sample PowerMTA Configuration File
Authentication: Ensure your DKIM keys and SPF records are properly linked within the
