Use the "four main categories" of bounces to determine if rules are too strict or relaxed. 4. Setting up Basic Monitoring (via Zabbix)
💡 : Use the pmta show status command in the CLI for a quick snapshot of current server health and active connections. powermta monitoring
Limitation: It does not store historical data well, making it hard to spot long-term trends. SNMP (Simple Network Management Protocol) Use the "four main categories" of bounces to
| Metric | Warning Threshold | Critical Threshold | |--------|------------------|--------------------| | Queue size (total) | >100k messages | >500k messages | | Hard bounce rate (per domain) | >5% | >10% | | Deferral rate (4xx) | >15% for 10 min | >30% for 30 min | | Disk usage (spool) | >75% | >90% | | PMTA process down | N/A | Immediate | | Complaint rate | >0.2% | >0.5% | Limitation: It does not store historical data well,
Your queue is the heartbeat of PMTA. A growing queue isn’t always bad—deferrals happen—but a queue that never drains is a warning sign.
PowerMTA logs everything to /var/log/pmta/ . The critical files are: