Postfix — Email MTA (Open Source)

Postfix is an open-source Email MTA solution. Compare it against 3 other Email MTA tools on FreeSoftwareX — by features, licensing and price — and request a quote or demo free in 2026.

What is Postfix?

Postfix is open source — its source code is publicly available and free to use, modify and self-host, usually with an active community and no licensing fees. It is categorised under Email MTA. Buyers typically evaluate Postfix when they need a dependable Email MTA option and want to weigh the trade-offs between free, open-source and paid tools before committing.

Postfix alternatives

If Postfix isn't the right fit, compare these Email MTA alternatives side by side:

EximHarakaOpenSMTPD

Frequently asked questions

Is Postfix free?
Yes. Postfix is open source and free to use, with no purchase cost for the core product.
What are the best Postfix alternatives?
Popular Email MTA alternatives to Postfix include Exim, Haraka, OpenSMTPD. See the full list of Email MTA on FreeSoftwareX.
What type of software is Postfix?
Postfix is an open-source Email MTA tool.

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