/smtp4dev

smtp4dev - the fake smtp email server for development and testing

Primary LanguageC#BSD 3-Clause "New" or "Revised" LicenseBSD-3-Clause

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

A dummy SMTP server for Windows, Linux, Mac OS-X (and maybe elsewhere where .NET Core is available). Lets you test your application without spamming your real customers.

smtp4dev support many advanced features:

  • OpenAPI/Swagger API
  • IMAP access to retrieve and delete messages
  • SMTP session logging
  • UTF8 support
  • Viewport size switcher to simulate mobile etc
  • Multipart MIME inspector
  • HTML compatibility report and HTML validation
  • TLS/SSL with implicit and STARTTLS modes and auto self-signed cert generation
  • Authentication
  • Multiple mailboxes along with rules to control what message goes where
  • Reply, compose and relay messages including rules to auto relay
  • Scripting expressions including error simulation

If you're looking for the older v2 Windows only GUI version. Grab it here.

Become a Patreon Donate If you find smtp4dev useful, please consider supporting further development by making a donation .

Getting Started

Installation Instructions

Configuration

Configuring your programs to send mails to smtp4dev

[API] (https://github.com/rnwood/smtp4dev/wiki/API)

Screenshots

Screenshot 1 Screenshot 2 FOSSA Status

License

FOSSA Status