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.

Features

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

Project Samples

Project Activity

See All Activity >

Categories

Email Servers

License

BSD License

Follow smtp4dev

smtp4dev Web Site

Other Useful Business Software
Try Google Cloud Risk-Free With $300 in Credit Icon
Try Google Cloud Risk-Free With $300 in Credit

No hidden charges. No surprise bills. Cancel anytime.

Use your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.
Start Free
Rate This Project
Login To Rate This Project

User Reviews

Be the first to post a review of smtp4dev!

Additional Project Details

Operating Systems

Linux, Mac, Windows

Programming Language

C#

Related Categories

C# Email Servers

Registered

2024-06-19