
Description: SMTPeter is an open-source email server software designed for small businesses and developers. It allows you to send, receive, and manage emails on your own servers with features like spam filters, email aliases, user management, and analytics.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mailjet is an all-in-one email service provider that offers email delivery, email marketing automation, and transactional email features. It allows sending emails at scale while ensuring deliverability through dedicated IP addresses and analytics.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API