
Description: SMTP Bucket is an email testing and debugging tool that allows you to capture, view, and analyze outbound email traffic without sending it to recipient inboxes. It provides a fake SMTP server to connect email clients or apps to, logs all email activity, and gives you tools to inspect messages.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Origami SMTP is an email testing and deliverability tool that allows you to send and analyze email campaigns to verify deliverability before sending large volumes. It provides detailed analytics on emails like opens, clicks, bounces, spam test results, and more.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API