
Description: msmtp is a command line SMTP client that can be used to send emails from the Linux command line or scripts. It is lightweight, easy to configure, and supports SMTP authentication, TLS encryption, several mailbox formats and more.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: sendEmail is an open source email transfer agent for Linux servers. It allows sending emails directly from the server without needing an external SMTP server. It has basic features like email scheduling, delivery retries, and logging.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API