How to Set Up PostMTA: Complete Installation Guide
PostMTA is the enterprise-grade email delivery platform built on KumoMTA. This guide walks through a production-ready setup.
Prerequisites
- Ubuntu 22.04 or Debian 12
- 2GB+ RAM, 20GB+ disk
- Static IP with reverse DNS configured
- Domain with DNS access
Step 1: Install PostMTA
# Download the installer
curl -sSL https://postmta.com/install | bash
# Or via Docker
docker run -d postmta/postmta:latest
Step 2: Configure Your Domain
Set up your sending domain with proper DKIM, SPF, and DMARC records.
Step 3: Configure Bounce Processing
PostMTA monitors bounce addresses and automatically suppresses invalid recipients.
Step 4: Warm Up Your IPs
Start with 1K emails/day and ramp up 20% daily to build sender reputation.
Monitoring
PostMTA dashboard shows delivery rates, bounces, and reputation metrics in real-time.
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