Deploy Mailhog on your own server.

Mailpit is a modern email testing tool designed for developers. It allows you to configure your application to use Mailpit for SMTP delivery, enabling you to view your outgoing emails in a user-friendly web UI. The app also offers the option to forward messages to real SMTP servers for delivery. With Mailpit, you can view messages in the web UI or retrieve them using the JSON API. It supports SMTP AUTH and PIPELINING and provides real-time updates using WebSocket. Mailpit also includes message search functionality, custom SMTP configurations, and HTTP basic authentication for its UI and API. It's lightweight, portable, and easy to deploy.

Maildev is a simple, self-hosted SMTP server designed for testing and debugging emails in development environments. It captures all outgoing emails and provides a web-based UI to view, inspect, and test them. Maildev supports real-time email updates, allowing developers to see emails as they are sent. It also includes an API for programmatic access to emails and supports multiple inboxes for testing different email scenarios. Maildev is lightweight, easy to set up, and works seamlessly in local development and CI/CD pipelines.

Gray Duck Mail is a user-friendly email discussion list application that offers an alternative to traditional email discussion group software. It is designed to be simple to set up and manage, making the process of running an email discussion list effortless. Gray Duck Mail is perfect for managing mailing lists between small to medium size groups, such as neighborhoods, schools, workplaces, and families. With Gray Duck Mail, you can send one email and automatically keep everyone in the loop. The application monitors a remote mail server for messages and processes them by relaying the message to all list members. It also automatically handles user subscriptions, unsubscription requests, and email bounces. Gray Duck Mail works with any external email host that allows for POP3/SMTP connections and message forwarding or aliasing. It relies totally on an external mail provider, allowing you to use an existing web host or email account.