smtp4dev
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.
About
smtp4dev is a cross-platform dummy SMTP server designed for developers and testers who need to simulate email delivery during application development without sending actual emails. It intercepts outgoing messages and provides tools for inspecting them via a web interface or progr…