
Description: smtp4dev is an open-source SMTP server designed for developers to test email sending applications locally. It provides a simple SMTP server without requiring email account credentials or an internet connection.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: DummySMTP is an open source SMTP server that allows you to test email sending and receiving without sending actual emails over the internet. It is lightweight, runs locally, and useful for testing email functionality in applications during development.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API