Organized team chat.
Zulip server and web application. Open-source team chat that helps teams stay productive and focused.
Zulip is an open-source team collaboration tool with unique topic-based threading that combines the best of email and chat to make remote work productive and delightful. Fortune 500 companies, leading open source projects, and thousands of other organizations use Zulip every day. Zulip is the only modern team chat app that is designed for both live and asynchronous conversations.
Become a leader in email innovation. JMAP is the developer-friendly, open API standard for modern mail clients and applications to manage email faster.
It’s official! JMAP has been published by the Internet Engineering Task Force (IETF).
Modernize your mail server. Secure & Modern All-in-One Mail Server (IMAP, JMAP, SMTP).
Self-hosting your mail server has been notoriously difficult. Not anymore! Stalwart is a scalable, secure and robust open-source mail server software designed for the 21st century.
A curated list of resources on Email tools, server, framework, technology...
Stop trying to avoid phishing. Choose a weapon and fight it...
PhishTool gives human analysts the power to reverse engineer phishing emails, to better defend against them. PhishTool is to phishing emails as a disassembler is to malware or a forensic toolkit is to file systems.
email & SMTP testing tool with API for developers.
Mailpit is a small, fast, low memory, zero-dependency, multi-platform email testing tool & API for developers. It acts as an SMTP server, provides a modern web interface to view & test captured emails, and contains an API for automated integration testing.
Use Foundation for Emails to design responsive HTML emails that work in any email client.
Quickly create responsive HTML emails that work on any device and client. Even Outlook.
Foundation for Emails (previously known as Ink) is a framework for creating responsive HTML emails that work in any email client — even Outlook. Our HTML/CSS components have been tested across every major email client to ensure consistency. And with the Inky templating language, writing HTML emails is now even easier.
Convert a simple HTML syntax into tables compatible with Foundation for Emails.
Inky is an HTML-based templating language that converts simple HTML into complex, responsive email-ready HTML. Designed for Foundation for Emails.
An automated e-mail OSINT tool.
Mosint is an automated email osint tool written in Go that allows you investigate for target emails in a fast and efficient manner. It consolidates numerous services, enabling security researchers to swiftly access a wealth of information.
DMARC, SPF, DKIM, BIMI checker.
Instantly test your domain to verify your DMARC, SPF, DKIM, BIMI configurations
The Merox solution helps you implement DMARC and many other DNS security protocols and standards.
💌 Build and send emails using React.
A collection of high-quality, unstyled components for creating beautiful emails using React and TypeScript.
Open-Source Phishing Framework
Gophish is a powerful, open-source phishing framework that makes it easy to test your organization's exposure to phishing.
rotation and revocation of DKIM keys.
dkim-rotate is a tool for managing DKIM (email antispam) keys in a manner that avoids unnecessarily making emails nonrepudiable.
Broadly, dkim-rotate intends to weaken the non-deniable authenticity of leaked and archived emails, while still retaining DKIM’s antispam function. For more discussion of the problem, and the chosen solution, see dkim-rotate(7), and Matthew Green’s article Ok Google: please publish your DKIM secret keys.