A free & open modern, fast email client with user-friendly encryption and privacy features

A cross-platform .NET library for IMAP, POP3, and SMTP.

Modern email for teams and professionals. A replacement for outdated email technology and tools. Alt to hey.com, front.com, missiveapp.com

Simple API, Complex Emails (Jakarta Mail smtp wrapper)

Golang package for send email. Support keep alive connection, TLS and SSL. Easy for bulk SMTP.

The collaborative Open Source successor to qmail and netqmail

Our Friendly Gmail will act as Server and implant will exfiltrate data via smtp and will read commands from C2 (Gmail) via imap protocol

Makes sending emails easy and DRY — For Python 3.

mailproxy is a simple SMTP proxy. It receives emails through an unencrypted, unauthenticated SMTP interface and retransmits them through a remote SMTP server that requires modern features such as encryption and/or authentication. mailproxy is primarily useful for enabling email functionality in legacy software that only supports plain SMTP.

Ansible role to set up postfix in Debian-like systems

High throughput Go SMTP pool library with graceful handling of idle timeouts, errors, and retries.

An SMTP library that helps you send email in Cloudflare Workers.

ESP32 with HTTP server, Telnet server, file system, FTP server FTP client, SMTP client, cron daemon and user management

SMTP Client Library in C

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

Ballerina module to send and receive emails

An Open Source Lightweight E-Mail Client

Minimal SMTP client in Go. Handles MX lookup, mail server connection on common ports.

Send and receive emails easily, fluently, with one line of code for each operation.

:love_letter: SMTP client library for Clojure. That’s it.

🌰️🐿️ SquirrelMail GitHub Repository (PHP 8.4-OK!)

Very lightweight CLI SMTP client to send emails from the command-line easily.

Object-Oriented Email Sending Java SDK

Moved to https://github.com/SimplifyNet. Simplify is a set of .NET libraries that provide infrastructure for your applications. DI and mocking friendly.

A plugin for ActionMailer to send emails via MailPace.com

An SMTP sender implementation in Swift using Swift NIO

Simple smtp client

:e-mail: Blat is a command line email tool (sending mail via smtp), written for Windows.

邮件接收发送 PHP Mail receiving and sending (PHP POP3 IMAP SMTP)

SMTP client for Zig