NaSMail is a standards-based webmail package written in PHP
Simple-to-use/-install issue-tracking system: web, REST, email, CLI
Remote anti spam utility
Email Notifier For Windows
Web and API based SMTP testing
Phishing Campaign Toolkit
Python API for Sendmail Milters.
An Asynchronous Pipelined Java client for Redis
Simple, modern & fast web-based email client
Zimbra Domain Admin for Zimbra Open Source Edition
Write email in Markdown and render them before sending
A Powerful PHP bulk email sending script with smtp support.
Send Mime and Smime Emails to Any Type of Mail Server
Multi-protocol server written in Java
tinyCampaign is a simple and lightweight newsletter system.
Simple, web-based address & phone book
Hide files into ZIP archives