
Description: Mercury Mail Transport System is an open-source mail transfer agent used for routing and delivering email across networks or the internet. It is designed to be fast, scalable, and reliable for enterprise-level email infrastructure.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Microsoft Exchange Server is an email and calendar server software developed by Microsoft. It allows enterprises to host business email, contacts, calendar, and tasks.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API