Powermta Configuration Guide Top <COMPLETE ✓>

Now go deliver.

| Problem | Cause | Fix | |---------|-------|-----| | High deferrals at Gmail | Too many connections per IP | Set max-smtp-out-per-ip 4 | | Bounce rate >5% | Poor list hygiene | Enable bounce classification + auto-suppression | | Low throughput | DNS blocking | Use dns-server 8.8.8.8 and dns-workers 16 | | IP blacklisting | Spikes in volume | Use <limits throttle X/hour> with gradual warmup | | No DKIM signature | Binding not linked | Verify dkim in VMTA and sign yes in binding | powermta configuration guide top

The PowerMTA configuration file is usually located at /etc/powermta/config or /etc/powermta/powermta.conf . The configuration file consists of several sections, including: Now go deliver

Authentication (optional): smtp-auth plain userdb /etc/pmta/users end smtp-auth limits throttle X/hour&gt

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max-msg-rate 1000/second # Global sending throttle max-errors-per-domain 10 # Soft bounce limit before backoff max-errors-per-ip 5 # Per-IP error limit