Showing 2916 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: 0 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
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  • 3
    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: 144 This Week
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  • 4
    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: 90 This Week
    Last Update:
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  • 5
    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: 368 This Week
    Last Update:
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  • 6
    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: 17 This Week
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  • 7
    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: 10 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: 7 This Week
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  • 9
    Bamboo

    Bamboo

    Testable, composable, and adapter based Elixir email library

    ...Emails are created, manipulated, and sent using plain functions. This makes composition a breeze and fits naturally into your existing Elixir app. Unit test with ease. Bamboo separates email creation and email delivery allowing you to test by asserting against email fields without the need for special functions. Dead-simple integration tests. Bamboo provides helper functions to make integration testing easy and robust.
    Downloads: 12 This Week
    Last Update:
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  • 10
    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: 32 This Week
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  • 11
    Postal

    Postal

    A fully featured open source mail delivery platform for incoming

    Postal is a complete, open-source mail delivery platform for managing massively scalable outgoing email infrastructure—designed as a self-hosted alternative to SendGrid, Mailgun, or Postmark. It provides a web UI for managing email streams, logs, and delivery infrastructure. Postal is highly scalable and intended for developers and businesses needing reliable email dispatch.
    Downloads: 4 This Week
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  • 12
    ElectronMail

    ElectronMail

    Unofficial ProtonMail Desktop App

    ...The way of verifying that the installation packages attached to the releases have been assembled from the source code is being provided. The app works on Linux/OSX/Windows platforms. Binary installation packages. Offline access to the email messages (attachments content not stored locally, but emails body content). The local store feature enables storing your messages in the encrypted database.bin file (see FAQ for file purpose details). So the app allows you to view your messages offline, running full-text search against them, exporting them to EML/JSON files. etc. ...
    Downloads: 60 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: 7 This Week
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  • 14
    MailTrackerBlocker

    MailTrackerBlocker

    Email tracker, read receipt and spy pixel blocker plugin, macOS Mail

    MailTrackerBlocker is a macOS Mail plugin that prevents email tracking pixels from collecting user data. It enhances privacy by blocking hidden tracking mechanisms used by marketing emails.
    Downloads: 2 This Week
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  • 15
    msgvault

    msgvault

    Archive a lifetime of email and chat. Offline search, analytics

    msgvault is a message archiving tool for email and chat history, built for offline search, analytics, and AI-assisted querying. It lets users preserve large volumes of personal or organizational messages in a local archive. The project uses DuckDB to support fast aggregate queries across hundreds of thousands of messages. It includes a terminal interface, command-line tools, and an MCP server for connecting archived messages to AI assistants.
    Downloads: 6 This Week
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  • 16
    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: 17 This Week
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  • 17
    Blackbird

    Blackbird

    OSINT tool for finding accounts across 600+ sites by username or email

    Blackbird is an open source OSINT tool designed to search for user accounts across social networks and online platforms using a username or email address. The project focuses on helping investigators, researchers, and security professionals quickly discover where a specific identity appears on the internet. It performs reverse searches across more than 600 websites by leveraging data from the community-driven WhatsMyName project, which improves detection accuracy and reduces false positives. ...
    Downloads: 57 This Week
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  • 18
    Inbucket

    Inbucket

    Disposable webmail server (similar to Mailinator) with built in SMTP

    Inbucket is an email testing application; it will accept messages from any email address and make them available to view via a web interface. When you need to test your webapp's outbound emails with Mailinator but are stuck behind a firewall, Inbucket provides the solution. It allows you to keep your new application development secret until it's time to release it.
    Downloads: 2 This Week
    Last Update:
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  • 19
    Foundation for Emails

    Foundation for Emails

    Design responsive HTML emails that work on any device & email client

    ...Inky converts simple HTML into the complex tables required for email layout.
    Downloads: 1 This Week
    Last Update:
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  • 20
    MJML 4

    MJML 4

    The only framework that makes responsive-email easy

    MJML is a markup language created by Mailjet and designed to reduce the pain of coding a responsive email. Its semantic syntax makes the language easy and straightforward while its rich standard components library shortens your development time and lightens your email codebase. MJML’s open-source engine takes care of translating the MJML you wrote into responsive HTML.
    Downloads: 11 This Week
    Last Update:
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  • 21
    Session Desktop

    Session Desktop

    A Decentralized, Onion Routed, Private Messenger

    Session Desktop is an open-source, privacy-focused messaging application that brings secure, decentralized communication to desktop environments such as Windows, macOS, and Linux, providing users with encrypted text, media, and group chats without requiring phone numbers or email addresses. Built on the Session protocol and the Loki network, it routes messages through a distributed onion-routing network that hides metadata like sender, timing, and location so that conversations are resistant to surveillance and correlation attacks. The desktop client pairs seamlessly with Session mobile apps but can also be used independently to communicate with Session contacts in a familiar desktop interface that supports a full keyboard, global notifications, drag-and-drop media sharing, and local file access. ...
    Downloads: 205 This Week
    Last Update:
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  • 22
    EmailValidator

    EmailValidator

    PHP Email address validator

    A library for validating emails against several RFC. This library aims to support RFCs 5321, 5322, 6530, 6531, 6532, and 1035. Composer is required for installation. Spoofchecking and DNSCheckValidation validation requires that your PHP system has the PHP Internationalization Libraries (also known as PHP Intl). PHP version upgrades will happen to accomodate to the pace of major frameworks. Minor versions bumps will go via minor versions of this library (i.e: PHP7.3 -> v3.x+1). Major versions...
    Downloads: 2 This Week
    Last Update:
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  • 23
    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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  • 24
    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: 3 This Week
    Last Update:
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  • 25
    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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