Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.

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.

CloudFlare free temp domain email 免费收发 临时域名邮箱 支持附件 IMAP SMTP TelegramBot

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

:mailbox: SMTP Server + Web Interface for viewing and testing emails during development.

Simple API, Complex Emails (Jakarta Mail smtp wrapper)

Papercut SMTP -- The Simple Desktop Email Server

An SMTP gateway for Apprise notifications.

Multi architecture simple SMTP server (postfix null relay) host for your Docker and Kubernetes containers. Based on Debian/Ubuntu/Alpine.

Flask-Mail adds SMTP mail sending to your Flask applications

The magma server daemon, is an encrypted email system with support for SMTP, POP, IMAP, HTTP and MOLTEN,. Additional support for DMTP and DMAP is currently in active development.

mailio is a cross platform C++ library for MIME format and SMTP, POP3, IMAP protocols. It is based on the standard C++ 17 and Boost library.