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

Buggregator — a single-binary debugging server for PHP. Captures exceptions, dumps, emails, profiling, logs in real-time UI. Sentry, Ray, VarDumper, SMTP, Monolog, Inspector, XHProf and more.

Create custom SMTP servers on the fly

A SMTP Server component written in C#

Exim Mail Transport Agent - source, testsuite and documentation

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

Moved to Codeberg

Simple Golang SMTP relay/proxy server

Feature-rich single-binary file server for red teamers and developers. HTTP/S · WebDAV · SFTP · SMB · NTLM hash capture · DNS/SMTP callbacks · TLS · Auth · Share links. A powerful python3 -m http.server replacement.

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

SMTP docker container

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

The first Open-Source high-performance MTA developed from the ground-up for high-volume email sending environments.