smtp4dev

smtp4dev is a lightweight, open-source fake SMTP server designed for developers to test and debug email functionality locally. It captures outgoing application emails and displays them through an easy-to-use web interface, allowing developers to validate email workflows without sending messages to real recipients or requiring an external mail server.

Features of smtp4dev:

• Provides a local fake SMTP server for application email testing.
• Captures and displays emails instantly through a web-based interface.
• Allows inspection of email content, headers, attachments, and SMTP sessions.
• Supports SMTP testing without internet access or external mail services.
• Helps developers debug notifications, alerts, and email-based workflows safely.
• Supports configurable SMTP ports, authentication, and TLS settings.
• Lightweight setup suitable for development, QA, and automated testing environments.
• Works with web applications, APIs, and CI/CD testing pipelines.

smtp4dev Usage Instructions:

Start smtp4dev:
$ sudo su
$ cd /opt/smtp4dev
$ docker compose pull
$ docker compose up -d
#Check container: $ docker ps
#Verify the image: 
$ docker inspect smtp4dev \
  --format '{{.Config.Image}}'

Access smtp4dev on Browser: $ http://YOUR_SERVER_IP

Disclaimer: smtp4dev is open-source software distributed under its respective open-source license. It is independently developed and maintained by the community and contributors and is not affiliated with any commercial entities unless explicitly stated. The software is provided "as is," without warranties or guarantees of any kind. Users are responsible for their usage and should ensure compliance with applicable laws, policies, and licenses.