smtp4dev

smtp4dev 3.15.0

A fake SMTP server for development.

  • By Robert N Wood
  • Open Source
  • Updated Mar 3, 2026
Download for Windows

About smtp4dev

A fake SMTP server for development.

What's new in 3.15.0

See full installation instructions and options

File Name | Description
-- | --
Winget package| Rnwood.Smtp4dev.Desktop Winget package (recommended easy option for Win10/11)
Winget package| Rnwood.Smtp4dev Winget package (Win10/11)
Rnwood.Smtp4dev-win-x64-3.15.0.zip | Windows x64 binary standalone - Server edition
Rnwood.Smtp4dev.Desktop-win-x64-3.15.0.zip | Windows x64 binary standalone - Desktop app edition.
Rnwood.Smtp4dev-win-arm64-3.15.0.zip | Windows ARM 64-bit binary standalone
Rnwood.Smtp4dev-linux-x64-3.15.0.zip | Linux x64 (Intel 64 bit) binary standalone
Rnwood.Smtp4dev-linux-musl-x64-3.15.0.zip | Linux MUSL x64 binary standalone for Linux distros using MUSL libc
Rnwood.Smtp4dev-noruntime-3.15.0.zip | Architecture independent version. Should run on any platform where the .NET 8.0 (or greater) runtime is installed
Docker images for Windows and Linux - How to use Docker image
.NET tool Rnwood.Smtp4dev 3.15.0 | .NET tool (recommended option for Mac OS) - How to use dotnet tool

Full release notes »

Technical details

PublisherRobert N Wood
Version3.15.0
Release date2026-03-03
LicenseBSD-3-Clause
Installer typezip
Architecturex64, arm64
Package IDRnwood.Smtp4dev

Links & install command

Install smtp4dev from the command line with Windows Package Manager (winget):

winget install --id=Rnwood.Smtp4dev -e

smtp-serversmtp4devwindowsrobertnwoodsimplemailtransferprotocolsimple-mail-transfer-protocol

Older versions

  • 3.10.3
  • 3.10.2
  • 3.10.1
  • 3.9.0

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