How to Set Up PostMTA: Complete Installation Guide

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.

Get started at postmta.com →