Showing 5959 open source projects for "email"

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  • 1
    react-email

    react-email

    Build and send emails using React

    react-email is a modern library for building responsive email templates using React components, bringing familiar frontend development practices into email design. It allows developers to create emails using reusable components, making it easier to maintain consistency across different templates and campaigns. The library supports rendering to HTML that is compatible with major email clients, addressing common challenges such as inconsistent styling and layout issues. ...
    Downloads: 4 This Week
    Last Update:
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  • 2
    Email Templates

    Email Templates

    Create, preview, and send custom email templates for Node.js

    Create, preview, and send custom email templates for Node.js. Highly configurable and supports automatic inline CSS, stylesheets, embedded images and fonts, and much more! Made for sending beautiful emails with Lad. We've added preview email by default to this package! If you run into any issues with configuration, files, templates, locals, etc, then you can use the DEBUG environment flag.
    Downloads: 0 This Week
    Last Update:
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  • 3
    Eclipse Mail

    Eclipse Mail

    eMail is a fork of Interlink for IA-32 i686 with more optimizations.

    Eclipse Mail is a fork of Interlink Mail and News made for Windows XP and runs on IA-32 i686 platforms. Some advantages over upstream and roytam1's mailnews are more optimizations and better interoperability with upstream. (using SQL storage intead of DBM)
    Downloads: 2 This Week
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  • 4
    PHPMailer

    PHPMailer

    The classic email sending library for PHP

    PHPMailer – A full-featured email creation and transfer class for PHP. Support for UTF-8 content and 8bit, base64, binary, and quoted-printable encodings. SMTP authentication with LOGIN, PLAIN, CRAM-MD5, and XOAUTH2 mechanisms over SMTPS and SMTP+STARTTLS transports. Validates email addresses automatically. Many PHP developers need to send email from their code.
    Downloads: 136 This Week
    Last Update:
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  • 5
    Thunderbird for iOS

    Thunderbird for iOS

    Open Source Email App for iOS

    Thunderbird iOS is the official iPhone and iPad email client offering from the Thunderbird project, bringing the capabilities of a feature-rich, open-source email experience to iOS devices with native UI and Apple platform integrations. The app gives users a powerful tool for managing multiple email accounts, including IMAP and POP3 configurations, and supports modern authentication flows like OAuth for popular providers.
    Downloads: 49 This Week
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  • 6
    Thunderbird for Android

    Thunderbird for Android

    Open Source Email App for Android (fka K-9 Mail)

    Thunderbird Android is the mobile counterpart of the popular Thunderbird email client, reimagined for Android phones and tablets so users can access, send, and organize email from multiple accounts with advanced features found in desktop clients. It embraces modern mobile UI design while supporting robust email protocols (IMAP/POP3) and standards like OAuth for secure logins to services such as Gmail, Outlook, or custom mail providers.
    Downloads: 8 This Week
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  • 7
    smtp4dev

    smtp4dev

    The fake smtp email server for development and testing

    smtp4dev - the fake SMTP email server for development and testing. A dummy SMTP server for Windows, Linux, Mac OS-X (and maybe elsewhere where .NET Core is available). Lets you test your application without spamming your real customers.
    Downloads: 41 This Week
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  • 8
    Tutanota

    Tutanota

    Open source email service with a strong focus on security and privacy

    Tutanota is an open source email client focused on security and privacy. It is built with end-to-end encryption and 2FA, so you can be assured of utmost email security. Tutanota is always encrypted, so whether you’re using their secure webmail client, mobile apps or desktop clients, you can be sure to communicate securely.
    Downloads: 5 This Week
    Last Update:
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  • 9
    K-9 Mail

    K-9 Mail

    Open Source Email App for Android

    K-9 Mail is an advanced, open-source email client for Android that's focused on making it easy to chew through large volumes of email. It's designed to be easy to use by both novice and power users, with plenty of useful features. It has IMAP push email support, support for multiple accounts, support for POP3 and Exchange 2003/2007 (with WebDAV), flagging, filing, signatures and more!
    Downloads: 4 This Week
    Last Update:
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  • 10
    PostfixAdmin

    PostfixAdmin

    Web based virtual user administration interface for Postfix mail

    PostfixAdmin is a web-based interface for managing mail domains, mailboxes, and aliases for Postfix mail servers. It allows administrators to add and configure virtual domains and email users easily, supporting MySQL, PostgreSQL, and SQLite as backend databases. It's widely used in self-hosted email setups for simplifying email management.
    Downloads: 7 This Week
    Last Update:
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  • 11
    Mailspring

    Mailspring

    A faster, leaner email client and fork of Nylas Mail

    Mailspring is a fast and lean mail client that’s a new version of Nylas Mail. It’s maintained by one of Nylas Mail’s original authors, with plenty of great features and enhancements such as a new C++ sync engine that allows it to use 50% less RAM. Heavy dependencies have also been removed and the package manager rewritten for even greater speed. Written in TypeScript with Electron and React, it is cross-platform (macOS, Windows and Linux) and designed to be easy to extend.
    Downloads: 9 This Week
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  • 12
    WhatBreach

    WhatBreach

    OSINT tool for discovering email addresses in known data breaches

    WhatBreach is an open source OSINT (Open Source Intelligence) tool designed to help users discover whether an email address has appeared in known data breaches. It simplifies the process of investigating compromised credentials by allowing users to search for a single email address or analyze multiple email addresses at once. It gathers breach information from various sources and APIs to identify where the email has been exposed in leaked databases or online paste sites. ...
    Downloads: 3 This Week
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  • 13
    Proton Mail Bridge

    Proton Mail Bridge

    Proton Mail Bridge application

    Proton Mail Bridge is a desktop application that runs in the background on Windows, macOS, and Linux to enable users to access their Proton Mail encrypted email accounts with traditional email clients like Outlook, Thunderbird, Apple Mail, and others via local IMAP/SMTP servers. Because standard IMAP cannot natively decrypt end-to-end encrypted messages, Bridge acts as a translator that downloads encrypted mail, decrypts it locally, and serves it to your preferred mail client over a local server, while encrypting outgoing messages before they’re sent to Proton’s servers. ...
    Downloads: 10 This Week
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  • 14
    SimpleLogin

    SimpleLogin

    The SimpleLogin back-end

    With email aliases, you can be anonymous online and protect your inbox against spams and phishing. Open-source. Made and hosted in Europe. Receive and send emails anonymously. Next time a website asks for your email address, give an alias instead of your real email. Emails sent to an alias are instantly forwarded to your inbox without the sender knowing anything.
    Downloads: 4 This Week
    Last Update:
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  • 15
    Proton Mail for Android

    Proton Mail for Android

    Proton Mail Android app

    Proton Mail for Android is the official mobile application that lets users access their Proton Mail encrypted email accounts securely on Android devices, providing the full suite of messaging features while preserving end-to-end encryption and user privacy. Designed for modern Android phones and tablets, the app lets users send, receive, organize, and search encrypted emails, create new Proton accounts, manage multiple accounts, and apply labels or folders to keep messages tidy — all within a responsive, touch-optimized interface. ...
    Downloads: 4 This Week
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  • 16
    MailDev

    MailDev

    Web Interface for viewing and testing emails during development

    MailDev is an SMTP server with a web interface designed for viewing and testing emails during development. It allows developers to inspect and debug emails sent from their applications without delivering them to real inboxes.
    Downloads: 5 This Week
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  • 17
    Proton Mail for iOS

    Proton Mail for iOS

    Secure email that protects your privacy

    Proton Mail for iOS is the official iPhone and iPad client that brings Proton’s secure, end-to-end encrypted email service to Apple’s mobile ecosystem, combining strong privacy protections with native performance and gestures. The app allows users to sign in to one or multiple Proton Mail accounts, read and compose encrypted messages, schedule emails, protect emails with passwords, set expiration timers, and organize mail with labels and folders inside a smooth, intuitive iOS interface. ...
    Downloads: 2 This Week
    Last Update:
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  • 18
    Mail-in-a-Box

    Mail-in-a-Box

    Take back control of your email with this mail server in a box

    Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server, a mail server in a box. Mail-in-a-Box lets you become your own mail service provider in a few easy steps. It’s sort of like making your own gmail, but one you control from top to bottom. Technically, Mail-in-a-Box turns a fresh cloud computer into a working mail server.
    Downloads: 4 This Week
    Last Update:
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  • 19
    holehe

    holehe

    Check if the mail is used on different sites

    holehe is a Python-based OSINT utility designed to determine whether a specific email address is registered across a wide range of online services. The tool works by leveraging password-reset mechanisms and other public account-existence checks to infer whether an email is associated with accounts on major platforms. It supports more than a hundred websites and is commonly used during reconnaissance, digital investigations, and account exposure assessments. holehe is designed to operate quickly and quietly, emphasizing efficiency and minimal footprint during enumeration tasks. ...
    Downloads: 39 This Week
    Last Update:
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  • 20
    Mox

    Mox

    modern full-featured open source secure mail server

    Mox is a modern email server written in Go that aims to be simple, secure, and standards-compliant. It includes SMTP, IMAP, DMARC, SPF, DKIM, and other protocols required to host email services. Designed for self-hosters and developers who want better control over their email stack, Mox focuses on code clarity, privacy, and correctness, offering a complete mail server solution that is easy to set up and maintain.
    Downloads: 0 This Week
    Last Update:
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  • 21
    Notifuse

    Notifuse

    Notifuse is an open-source & modern emailing platform

    ...It’s built with a Go backend and a React frontend to offer both developer-friendly APIs and a user-centric visual interface with enterprise-grade capabilities such as campaign creation, subscriber segmentation, and detailed analytics. Notifuse supports both newsletters and transactional emails through a RESTful API, letting organizations maintain full control over their email infrastructure without expensive per-message pricing. The system includes a drag-and-drop MJML email builder, webhook integrations, and multi-provider support for SMTP services and cloud providers, while also tracking opens, clicks, and delivery performance in real time.
    Downloads: 1 This Week
    Last Update:
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  • 22
    Rspamd

    Rspamd

    Rapid spam filtering system

    Rspamd is an advanced spam filtering system and email processing framework that allows evaluation of messages by a number of rules including regular expressions, statistical analysis and custom services such as URL black lists. Each message is analysed by Rspamd and given a verdict that might be used by MTA for further processing (e.g. to reject a message, or add a special header indicating spam) along with other information, such as possible DKIM signature or modifications suggested for a message. ...
    Downloads: 4 This Week
    Last Update:
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  • 23
    Cypht

    Cypht

    Lightweight Open Source webmail written in PHP and JavaScript

    All your E-mail, from all your accounts, in one place. Cypht is not your father's webmail. Unless you are one of my daughters, in which case it is your father's webmail. Cypht is like a news reader, but for E-mail. Cypht does not replace your existing accounts - it combines them into one. And it's also a news reader. The driving force behind Cypht development is to provide combined views for multiple accounts, but it's also a standard E-mail client that lets you browse and manage IMAP...
    Downloads: 13 This Week
    Last Update:
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  • 24
    Odysseus

    Odysseus

    Self-hosted AI workspace from PewDiePie

    Odysseus is a self-hosted AI workspace designed for running language-model workflows on user-controlled infrastructure. It provides an interface for chat, agents, tools, research, model serving, email, and other AI-assisted productivity tasks. The project emphasizes local-first and privacy-first operation, with no telemetry by default. It is built for users who want a personal AI environment rather than a fully hosted commercial assistant. Odysseus can work with local models while still leaving room for external API use when the user chooses. ...
    Downloads: 1,339 This Week
    Last Update:
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  • 25
    Google Apps Manager

    Google Apps Manager

    Command line management for Google G Suite

    Google Apps Manager or GAM is a free and open source command line tool for Google G Suite Administrators that allows them to manage many aspects of their Google Apps Account quickly and easily. With GAM you can create and manage users, groups and domains; manage email, security and calendar settings; manage admins and organizations and many more. To use GAM Google Apps Business, Education, Partner or Government Edition is required.
    Downloads: 10 This Week
    Last Update:
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