
Description: KumoMTA is an open source mail transfer agent designed to be lightweight, fast, and secure. It aims to provide a simple SMTP server for receiving, routing, and delivering email without unnecessary complexity.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: MailerQ is an open source message queue for sending large volumes of email efficiently. It can process millions of messages per minute with low latency using concepts like event looping, message storage, and parallel processing.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API