LunaticSMTP

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LunaticSMTP is a dummy SMTP server with desktop GUI for testing email sending applications.

LunaticSMTP screenshot 1

Cost / License

Free
Open Source (GPL-3.0)

Platforms

Mac
Windows
Linux
BSD
JavaFX
Java

LunaticSMTP screenshot 1

LunaticSMTP screenshot 2

LunaticSMTP alternatives

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Features

Portable
Email testing
SMTP Support

Tags

LunaticSMTP News & Activities

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Recent activities

klivan added LunaticSMTP as alternative to MailFixture
2 months ago

LunaticSMTP information

Developed by
Unknown
Licensing
Open Source (GPL-3.0) and Free product.
Written in
Java
Alternatives
23 alternatives listed
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Supported Languages
- English

AlternativeTo Categories

Development, Office & Productivity

GitHub repository

58 Stars
3 Forks
0 Open Issues
Updated Sep 11, 2026

Popular alternatives

LunaticSMTP was added to AlternativeTo by tymbarlat on Jan 2, 2017 and this page was last updated Feb 13, 2019.

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What is LunaticSMTP?

LunaticSMTP is a dummy SMTP server with desktop GUI for testing email sending applications.

To use it, start LunaticSMTP and configure your application to use 'localhost' as it's SMTP server. Now it will catch messages sent to it and allow you to view them.

Written in JavaFX. Requires Java 8+. License: GPLv3+.