1245 Open source projects that are alternatives of or similar to Mailspring

Sendria (formerly MailTrap) is a SMTP server designed to run in your dev/test environment, that is designed to catch any email you or your application is sending, and display it in a web interface instead of sending to real world.

Postfwd plugin for blocking international spam botnets based on geographical location of IP addresses used to login to postfix via sasl.

Delta Chat Rust Core library, used by Android/iOS/desktop apps and bindings

Library to send e-mails over different transports and protocols (like SMTP and IMAP) using immutable messages and streams. Also includes SMTP server.

macOS camera recording using ffmpeg

A third-party, open-source ProtonMail CardDAV, IMAP and SMTP bridge

A fully tested email parser for PHP 7.2+ (mailparse extension wrapper).

How to get emails including there attachments and how to extract various attributes from those emails. See https://youtu.be/zFEEGkvo6O8 for a more detailed information.

Unofficial, free and open-source Inbox by Gmail Desktop App

✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat

A Python script for incremental backups of IMAP mailboxes

End-to-end encrypted email for the mesh networking age

A lightweight PHP SMTP mail sender

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.

The legitimate email replacement — n-identity, decentralized, store-and-forward, open protocol, open source. (Server)

The best free email forwarding for custom domains. Visit our website to get started (SMTP server)

Official Node.js library for the Postmark API

Send emails using Django template system

The best free email forwarding for custom domains (Web Server)

An automated e-mail OSINT tool

Email Integration for Mattermost

small mail server

IMAP, POP3 and SMTP clients for Dart developers. Contains both low level as well as a high level API.

The Hoa\Mail library.

MacOS app to change the screen brightness on the menubar.

A simple Python script that reads a text file with lots of e-mails and passwords, and tries to check if those credentials are valid by trying to login on IMAP servers.

asynchronous library for sending and receiving mail via fs2._

The one and only django app to receive & send mail with templates and multiple configurations.

基于 Net.Mail 封装的发送邮件工具类。仅需一行代码，发送邮件。支持自定义邮件发出邮箱、发出方名字等。 支持SSL加密发送。 多个接收人、抄送人。支持群发独显。 支持添加附件、多个附件。 目前大部分主流邮箱全支持。

Email-based instant messaging for Desktop.

A better simple reactive system monitor on macOS for your MacBook pro. Built with Electron.

Mail4Delphi uses the Indy component to send the email.

📥 An IMAP library for clients and servers

Simple email parsing for Golang

KeePassXC is a cross-platform community-driven port of the Windows application “Keepass Password Safe”.

Send mail from Laminas or Mezzio using external mail services.

Colorify - simple, yet powerful color library.

💌 A menubar/taskbar Gmail App for Windows and macOS

Scalable KanColle browser and tool.

Plugin for Nylas Mail that adds a quick unsubscribe button for email.

Modular Notifications (InApp, Email, SMS, CustomBackend etc) for Django

Bundle web apps to native OS X app

Assistant for Hattrick online football manager

Rapid spam filtering system.

Postfix filter/hook to automatically encrypt outgoing emails with PGP/GPG

The most popular open source electronic health records and medical practice management solution.

Socket.io based chat server and clients, implemented in NodeJS and distributed to Windows and MacOS.

Spring Boot 2.x code examples

I2P-Bote is a serverless, encrypted e-mail application.

Callback for Maoni to send feedbacks via email. Relocated to https://github.com/maoni-app/maoni/tree/master/callbacks/maoni-email

Mosaico - Responsive Email Template Editor

Get download/upload speeds via speedtest.net or fast.com from command line using Bash script -- suitable for logs. POSIX OSX Linux

Objektiv is a utility that lets you switch your default browser easily.

The ultimate spinning wheel view that supports dynamic content and rich customization.

[Work in Progress] Minimalist Vim Based Editor for the 30th Century

Unoffcial NVIDIA CUDA GPU support version of Google Tensorflow for MAC OSX

An app for making visual comparisons

Point of Sale Desktop App built with Electron

Mandrill SMTP API integration for ActionMailer

Eventum Issue Tracking System