An email and SMTP testing tool with API for developers

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

smtp4dev - the fake smtp email server for development and testing

Papercut SMTP -- The Simple Desktop Email Server

Mini SMTP server written in golang

Disposable webmail server (similar to Mailinator) with built in SMTP, POP3, RESTful servers; no DB required.

Local, web-based mail server application. Slurp mails into oblivion!

PostfixAdmin - web based virtual user administration interface for Postfix mail servers

Create custom SMTP servers on the fly

Buggregator is a lightweight, standalone server that offers a range of debugging features for PHP applications.

Exim Mail Transport Agent - source, testsuite and documentation

A SMTP Server component written in C#

A Python Mail Server

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

SMTP docker container

A tiny software that receive a smtp request (email) and send it to the specified webhook as a http post request

Simple Golang SMTP relay/proxy server

A simple SMTP Server for Testing purposes. Emails are stored in an in-memory database and rendered in a Web UI

Simple SMTP relay docker image.

A reimplementation of the Python stdlib smtpd.py based on asyncio.