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

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

Server framework and network components written by C/C++ for Linux, Mac, FreeBSD, Solaris(x86), Windows, Android, IOS

Collaborative open-source successor to qmail

Makes sending emails easy and DRY — For Python 3.

asyncio smtplib implementation

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.

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

Ansible role to set up postfix in Debian-like systems

Simplify is a set of .NET libraries that provide infrastructure for your applications. DI and mocking friendly.

Object-Oriented Email Sending Java SDK

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

💌 SMTP client library for Clojure. That’s it.

This is a SMTP client written in go

SMTP Client Library in C

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

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

Web email client supporting HTML template and SMTP

SMTP DANE testing tool

Simple python script that connects to a mail server via IMAP and SMTP and replies to all emails in the inbox coming from a certain sender address using the Reply-To header.

Simple smtp client

📧A disposable email client built with Flask. Need a temporary email? Look no further!

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

SquirrelMail GitHub Repository (PHP 7-OK!)

Best Practice codes

📫 A simple SMTP client to send e-mails using C++ and the Qt framework

I am ZTimestamp, a Magnitude, a point in time, an alternative to DateAndTime and TimeStamp

Sending messages and emails made easy for PHP.

Experimental IMAP, POP3 and SMTP client for Dart developers.

Simplify is an open-source set of .NET libraries that provide infrastructure for your applications. DI and mocking friendly.