PostMTA

PostMTA is an enterprise email delivery platform built on KumoMTA.

Pricing: paid — Free trial available · Visit website

PostMTA is a robust self-hosted email delivery solution designed for enterprises. It leverages AI-powered deployment, offers over 71 REST APIs, and includes features like DKIM/DMARC/BIMI support, IP warmup automation, bounce management, SMTP relay, and advanced deliverability analytics.

Pros

AI-powered deployment
Over 71+ REST APIs
Advanced email deliverability analytics

Cons

Self-hosted requires technical expertise
Limited free tier available
Initial setup can be complex

FAQ

Is PostMTA open source?

No, it is a paid solution.

Does PostMTA support DKIM/DMARC/BIMI?

Yes, it supports these features.

What is the pricing model for PostMTA?

Paid with a free trial.

Last updated: 2026-06-21