Postal vs Postfix
A side-by-side comparison of two self-hosted mail servers options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Postal
Complete mail delivery platform for outgoing email
VS
Postfix
Fast, secure and reliable mail transfer agent
| Feature | Postal | Postfix |
|---|---|---|
| Category | Mail Servers | Mail Servers |
| License | MIT | IPL-1.0 |
| Language | Ruby | C |
| Setup difficulty | Hard | Hard |
| Min. RAM | 2,048 MB | 128 MB |
| Deployment | docker, bare-metal | docker, bare-metal, source |
| GitHub stars | ★ 16,724 | ★ 563 |
| First released | 2017 | 1998 |
| Replaces | SendGrid, Mailgun, Postmark | Microsoft Exchange |
Why pick each one
Frequently asked questions
Is Postal or Postfix better?
Neither is universally better. Postal has the larger community; both share a hard setup difficulty, so the decision comes down to features and licensing.
Are Postal and Postfix free and open-source?
Yes. Postal is licensed under MIT and Postfix under IPL-1.0. Both can be self-hosted at no software cost.
Can I run Postal and Postfix with Docker?
Postal: yes. Postfix: yes.