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.
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💌 Free, Open Source HTML Email Editor and Designer. Free, open source, HTML email template editor and no code designer.
Open-Source PIM Tools in Rust.
Pimalaya is an ambitious project that aims to improve open-source tools related to Personal Information Management (also known as PIM), which includes emails, contacts, calendars, tasks and more.
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An email client that functions like a kanban board, for Mac/Windows/Docker.
mutt-wizard is a tool that automatically sets up a NeoMutt-based minimal
email system.
It configures mutt and isync with a default interface and safe passwords.
A self-hosted email client with an AI agent, running entirely on Cloudflare Workers.
Agentic Inbox lets you send, receive, and manage emails through a modern web interface -- all powered by your own Cloudflare account. Incoming emails arrive via Cloudflare Email Routing, each mailbox is isolated in its own Durable Object with a SQLite database, and attachments are stored in R2.
Dovel is a SMTP server that sends and receives emails acording to a simple configuration file. It also comes with an optional web interface that you can use to browse your emails. It is designed to be simple and easy to use, and will remain so. Dovel is great because:
Modern Webmail Client for Stalwart Mail Server.
Webmail built for the 21st Century. A modern, self-hosted email client for Stalwart Mail Server powered by the JMAP protocol. Email, calendar, contacts and files. Fast, private, and open source.
All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool. Input a domain name or IP Address or Host Name. Links in the results will guide you to other relevant tools and information. And you'll have a chronological history of your results.
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.
Automate and clean your inbox. Clean Up Your Inbox In Minutes.
Bulk unsubscribe from newsletters, automate your emails with AI, block cold emails, and view your analytics. Open-source.
Atmail is a proven, versatile email and groupware platform.
A versatile easy to use virtual appliance to protect you from spam
The idea about eFa is to create a (virtual) appliance for spam fighting using open-source tools. We try to combine existing open-source projects into one easy to use and fast to deploy (virtual) appliance.
eFa is a community based product, we try to create the best possible spam filter product out there based on existing open-source software. See the about page to find out which existing project we use to combine, tune and support to create one great appliance.
✉️ Send e-mails with Node.JS – easy as cake!
Nodemailer is a module for Node.js applications to allow easy as cake email sending. The project got started back in 2010 when there was no sane option to send email messages, today it is the solution most Node.js users turn to by default.
The next generation Web development environment
Install your PHP/Node.js Web development environment in just 3 minutes, with no dependencies and non-intrusive. It includes web server, databases, email, DNS & common tools — everything you need for development.
Archive a lifetime of email and chat. Offline search, analytics, and AI query over your full message history. Powered by DuckDB.
Your messages are yours. Decades of correspondence, attachments, and history shouldn't be locked behind a web interface or an API. msgvault downloads a complete local copy and then everything runs offline. Search, analytics, and the MCP server all work against local data with no network access required.
Currently supports Gmail, with WhatsApp and other messaging platforms planned.
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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).
Patterns for Responsive HTML Email Templates.
A few simple, but solid patterns for responsive, accessible HTML email in (almost) every email client.
Self-Hosted Email Delivery & Inbound Platform.
Self-hosted email delivery platform that enables applications to send emails via HTTP APIs while handling SMTP delivery, templates, storage, security, and analytics. Fully self-hostable alternative to services like SendGrid or Mailgun.
🚀 The open-source notifications infrastructure. A fully-featured microservice to send SMS, E-mail, Slack and Push notifications. Embeddable notification center for React with real-time updates, content management, and much more... Notification management simplified. The ultimate service for managing multi-channel notifications with a single API.
BlueMind, la solution française souveraine et Open Source pour votre messagerie collaborative professionnelle. Nous Avons Le Choix !
disposable email server with easy setup.
Whenever you sign up with your email on a website, your email address is stored and sometimes sold to advertisers. This is where you get your bulk of spam emails. Whenever a data breach happens, you also risk having your primary email address leaked and informations stolen.
Using Nortix Mail, you can create disposable email addresses that can be used to sign up to website that requires email verification. This is very useful when you just want to try out new website / services without giving away your real email address. It significantly enhances privacy, security and reduces spam. It's like running your own Gmail server.
An Open-Source MailServer, NewsLetter, Email Marketing Solution.
BillionMail gives you open-source MailServer, email marketing — fully self-hosted, dev-friendly, and free from monthly fees.
getmail 6 is a flexible, extensible mail retrieval system with support for POP3, IMAP4, SSL variants of both, maildirs, mboxrd files, external MDAs, arbitrary message filtering, single-user and domain-mailboxes, and many other useful features.
Script PHP pour générer & pourquoi pas héberger des emails jetables / poubelles. Vous pourrez ainsi facilement gérer vos adresses de redirections temporaires.
Open source DMARC report analyzer and visualizer
Newsletters spam test. Test the Spammyness of your Emails.
Turn mailboxes into issue boards.
Multi-tenant application that syncs project mailboxes (IMAP/SMTP) with issue trackers. Supported providers: GitLab (cloud + self-hosted) and GitHub (cloud + Enterprise Server).
💌 A beautiful, fast and fully open source mail client for Mac, Windows and Linux.
Boost your productivity and send better email with Mailspring, the best mail client for Mac, Linux, and Windows.
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A project to rapidly extract all email addresses from any files in a given path.
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Virtual Mailbox Administration.
The ViMbAdmin project (vim-be-admin) provides a web based virtual mailbox administration system allowing mail administrators to manage domains, mailboxes and aliases.
A completely free and open source email validation API that never stores your data. Built to support solopreneurs and the developer community.
A high-performance, cost-effective email validation service designed for indie hackers and small startups. The service validates email addresses in real-time, checking syntax, domain existence, MX records, and detecting disposable email providers. The main focus is on precision instead of recall, meaning instead of edge cases the focus is on having the biggest coverage.
A Cloudflare-based email service.
A simple, responsive email service designed to run on Cloudflare Workers 🎉. With only one domain, you can create multiple different email addresses, similar to major email platforms. This project can be deployed on Cloudflare Workers to reduce server costs and build your own email service.
Quickly build HTML emails with utility-first CSS.
Maizzle is a framework that helps you quickly build HTML emails with Tailwind CSS and advanced, email-specific post-processing.
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.
Eonvelope is an open-source self-hostable email archive built with the django framework.
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🕵️♂️ (2-in-1) Email & Username OSINT suite. Analyzes 205+ scan vectors (100+ email / 105+ username) for security research, investigations, and digital footprinting.
The ultimate tool for finding a unique username across GitHub, X, Reddit, Instagram, and more in a single command.
A Go web application to generate email signatures and host uploaded images with S3.
GoMailMark allows users to enter information about them, uploads given images to S3, and generates an HTML signature using Templ.
Your personal email digest, Your personal daily digest The links you can't miss, the best content from your favorite creators and newsletters, in a daily email digest.
Everyone knows what an email address is, right?
Decide if each email address is valid or not. I used the email-addresses library to verify against the relevant RFCs. Enjoy.
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Lieer is a fast email-fetching, sending,
and two-way tag synchronization between notmuch and GMail.
This program can pull, and send, email and labels (and changes to labels)
from your GMail account and store them locally in a maildir with the labels
synchronized with a notmuch database.
The changes to tags in the notmuch database may be pushed back remotely to
the GMail account.
Signal Spam is a non-profit association that allows Internet users to report anything they consider to be spam in their email. Reports are assigned to authorities or professionals who are able to take action against this spam.
Nowadays many companies and organizations (non-profits, units of governmental and educational institutions, etc) believe that running their own mail servers has become an impossible task, due both to the large amount of inbound spam and to the continuous attempts by spammers to send outbound spam through their mail servers. Companies often lack in-house technical resources to configure and run a mail server properly and deal with these threats. For these reasons, many organizations decide to outsource their email service to external entities.
PEPS is an email, file sharing and collaboration server that intends to fullfil the need for high-quality on-premises software that could rival with top-notch SaaS products such as Gmail or Dropbox, and innovate with new features.
An automated phishing tool with 30+ templates. This Tool is made for educational purpose only ! Author will not be responsible for any misuse of this toolkit !
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CLI to manage emails, based on email-lib.
Pimalaya is an ambitious project that aims to improve open-source tools related to Personal Information Management (as known as PIM) which includes emails, contacts, calendars, tasks and more.
iRedMail - Free, Open Source Mail Server Solution
Zammad is a web-based, open source user support/ticketing solution.
Zammad is a web based open source helpdesk/customer support system with many features to manage customer communication via several channels like telephone, facebook, twitter, chat and e-mails.
Transparently add OAuth 2.0 support to IMAP/POP/SMTP client applications, scripts or any other email use-cases that don't support this authentication method.
An IMAP/POP/SMTP proxy that transparently adds OAuth 2.0 authentication for email clients that don't support this method. Keep legacy email clients working with Exchange Online, Gmail and other providers.
A robust email server.
A resilient & standards-compliant open-source IMAP server with built-in encryption
Open source push technology.
Z-Push is an open-source application to synchronize ActiveSync compatible devices such as mobile phones, tablets and Outlook 2013 and above. With a history of over 9 years of successful synchronization with multiple backends Z-Push is the leading open source push synchronization.
💌 Build and send emails using React.
A collection of high-quality, unstyled components for creating beautiful emails using React and TypeScript.
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disposable email server with an easy setup.
Whenever you sign up with your email on a website, your email address is stored and sometimes sold to advertisers. This is where you get your bulk of spam emails. Whenever a data breach happens, you also risk having your primary email address leaked and informations stolen.
Using Nortix Mail, you can create disposable email addresses that can be used to sign up to website that requires email verification. This is very useful when you just want to try out new website / services without giving away your real email address. It significantly enhances privacy, security and reduces spam. It's like running your own Gmail server.
Bring Back YouTube Email Notifications! YouTube upload email notification replacement
In August 2020, YouTube removed the feature of sending email notifications when a subscriber uploads a video. Many watchers, myself included, prefer email notifications to app notifications. This project aims to provide a replacement to YouTube's email notifications. Running this small program checks all your subscribers and sends emails with the links to new videos.