Private email infrastructure & deliverability engineering
northboundmail.net
NorthboundMail Systems
Est. 2011 — SMTP infrastructure & deliverability
Infrastructure

PowerMTA

Licensed PowerMTA nodes operated by engineers who have run it in production for over a decade. VMTA topologies, bounce classification, DKIM signing, monitoring and tuning delivered as a service.

Overview

PowerMTA is the reference commercial MTA for high-volume senders. It is designed for throughput, granular per-domain policy and detailed bounce classification. It is also unforgiving of misconfiguration.

Northbound operates licensed PowerMTA installations for clients that need its throughput and per-VMTA control. We handle the license procurement, installation, config management, per-domain tuning and ongoing operations. The client receives the benefits of PowerMTA without the burden of running it.

For clients whose profile does not justify PowerMTA licensing, we run Postfix or OpenSMTPD with equivalent care. We do not treat MTA choice as a religion.

Benefits

  • Per-VMTA queue and connection policy
  • Rich bounce classification piped to your systems
  • Domain-specific retry, throttling and back-off policy
  • Native DKIM/DomainKeys, per-VMTA signing
  • Detailed accounting logs for downstream analytics

Technical specifications

PowerMTA version5.x, current stable
Config managementVersion-controlled, per-node overlays
VMTA topologyCustom per client — no shared template
Bounce categoriesFull RFC 3463 classification, provider-specific tags

Use cases

  • — Marketing senders exceeding 1M messages per day per stream
  • — Enterprises requiring per-domain policy control
  • — Migrations from Momentum, PMTA competitors, or SaaS ESPs

Questions

Do you resell PowerMTA licenses?
We procure licenses on the client's behalf as part of the engagement. Standalone license resale is not our business.
Can you take over an existing PMTA deployment?
Yes. We audit the config, identify risk, and migrate to a supported topology on an agreed schedule.

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