How to set up a lightweight SMTP relay for your apps in seconds

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DEV Community · wizard · 2026-08-20 개발(SW)
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If you are running local applications, internal microservices, or custom scripts, you often just need a simple way to send email notifications without configuring a bloated, traditional Mail Transfer Agent (MTA) like Postfix.

That is why I created ZeroSMTP – a lightweight, open-source SMTP relay gateway designed to keep things fast, simple, and frictionless.

Why ZeroSMTP?

  • Lightweight & Fast: Built for straightforward email relaying without heavy configuration overhead.
  • Open Source: Fully transparent code that you can inspect, modify, and self-host easily.
  • Developer Friendly: Great for capturing logs, routing local development mails, or triggering server alerts.

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How to Get Started

Check out the repository to see the installation steps and docker configurations. If you are into self-hosting, developer tools, or mail infrastructure, give it a try!

I would love to hear your feedback, feature ideas, or pull requests. Let me know what you think in the comments below!“

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