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mailx — Email Client (Open Source)

mailx is an open-source Email Client solution from Unix. Compare it against 51 other Email Client tools on FreeSoftwareX — by features, licensing and price — and request a quote or demo free in 2026.

What is mailx?

mailx 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 Client and published by Unix. Buyers typically evaluate mailx when they need a dependable Email Client option and want to weigh the trade-offs between free, open-source and paid tools before committing.

mailx alternatives

If mailx isn't the right fit, compare these Email Client alternatives side by side:

AlpineApple MailBalsaBecky! Internet MailBlitzMailCanary MailCitadelClaws MailElmEudoraEvolutionFairEmailFirstClassForte Agent

Frequently asked questions

Is mailx free?
Yes. mailx is open source and free to use, with no purchase cost for the core product.
What are the best mailx alternatives?
Popular Email Client alternatives to mailx include Alpine, Apple Mail, Balsa, Becky! Internet Mail. See the full list of Email Client on FreeSoftwareX.
What type of software is mailx?
mailx is an open-source Email Client tool developed by Unix.

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