| Metric | PowerMTA 60r3 Performance | |--------|----------------------------| | Injection (messages/second) | 15,000 - 25,000 | | Outbound delivery (mixed domains) | 250,000 - 500,000 per hour | | Concurrent SMTP connections | 65,000 (requires kernel tuning) | | Queue size (spool) | 10 million messages before performance degradation | | Memory usage (idle) | ~600MB | | Memory usage (full load) | 4GB - 8GB |
Obtain a server with a dedicated IP address, ensure Port 25 is open by the hosting provider, and set up your DNS records (A, PTR, SPF, DKIM). powermta 60r3
Cap the number of emails sent per minute or per hour over a single connection. 000 - 25
