Version 3.7
PowerMTA Engineering Center
A practical workspace for designing, validating, operating, and troubleshooting PowerMTA infrastructure.
32directive references
20configuration examples
5interactive builders
Directive index
Browse operational references by scope and purpose.
Configuration library
Review copy-ready baselines and deployment checklists.
Builder Labs
Generate VMTA, pool, domain, SMTP user, and pattern-list blocks.
Troubleshooting
Diagnose parsing, routing, queue, connection, TLS, and reputation problems.
Production principles
- Use unique credentials and identities for each application or customer.
- Align source IP, PTR, forward DNS, EHLO, envelope sender, DKIM, and visible From identity.
- Separate transactional, marketing, warm-up, and customer traffic where risk differs.
- Tune provider policies from current SMTP responses instead of copied fixed values.
- Validate syntax and referenced objects before every reload.