
Description: Postbox is an email client for Windows and macOS that provides a clean, easy-to-use interface for managing multiple email accounts. It supports POP3, IMAP, Exchange, Gmail, Outlook.com, Yahoo and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mailburn is an email client and organizer software that allows users to easily manage multiple email accounts from one interface. It provides advanced features like email templates, scheduling, reminders, and automations.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API