smtp4dev

7 likes

The fake SMTP email server for development and testing.

smtp4dev main user interface

Cost / License

Free
Open Source (BSD-3-Clause)

Application type

Mail Server

Origin

United Kingdom

Platforms

Windows
Linux
Mac

smtp4dev main user interface

smtp4dev alternatives

7likes

0articles

Features

No Tracking
Ad-free
SMTP Support
Mail Server

Tags

Highlights All activities

Recent activities

klivan added smtp4dev as alternative to MailFixture
3 months ago

smtp4dev information

Developed by
rob@rnwood.co.uk
Licensing
Open Source (BSD-3-Clause) and Free product.
Written in
C#
Alternatives
21 alternatives listed
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Supported Languages
- English

AlternativeTo Categories

Development, Office & Productivity, Online Services

GitHub repository

4,004 Stars
426 Forks
26 Open Issues
Updated Oct 13, 2026

Popular alternatives

smtp4dev was added to AlternativeTo by Ola Johansson on Dec 9, 2009 and this page was last updated May 19, 2025.

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Install from the command line

winget install -e --id Rnwood.Smtp4dev

Be careful what you paste into a terminal. Check what a command installs before running it.

What is smtp4dev?

smtp4dev - the fake SMTP email server for development and testing.

A dummy SMTP server for Windows, Linux, Mac OS-X. This program lets you test your application without spamming your real customers.