
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: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mailtrap is an email testing and fake SMTP service for developers. It allows sending and receiving email messages without actually delivering them, useful for testing email functionality in applications under development.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API