Testing emails can be hard when you build software. You do not want to send test emails to real customers by mistake. smtp4dev is a great tool that solves this problem. It catches emails so they do not go out to the real internet. Here is how you can use it to test your emails safely. What is smtp4dev?
smtp4dev is a fake email server for developers. It sits on your computer and waits for emails. When your app sends an email, smtp4dev intercepts it.
You can then open a web page to see how the email looks. No emails ever leave your computer. This makes testing safe and fast. Step 1: Install and Run smtp4dev
You can run smtp4dev in two easy ways. Choose the one you like best. Option A: Use Docker (Recommended)
If you have Docker on your computer, run this command in your terminal: docker run -p 3000:80 -p 25:25 -d rnwood/smtp4dev Use code with caution. Option B: Download the App Go to the smtp4dev page on GitHub.
Download the version for your computer (Windows, Mac, or Linux). Open the file and run it. Step 2: Open the Web Screen
Once the tool is running, open your web browser. Type this address into the bar:http://localhost:3000
You will see a clean dashboard. This is your fake inbox. Any email your app sends will show up here. Step 3: Change Your App Settings
Now you must tell your software to use smtp4dev. Go to your app’s configuration file. Change your email settings to match these details: Server / Host: localhost Port: 25 Username: Leave this blank Password: Leave this blank Secure Connection (SSL/TLS): Turn this off Step 4: Test Your Emails
Trigger an action in your app that sends an email. For example, pretend to reset a password or create a new user account.
Go back to your browser window at http://localhost:3000. You will see the new email appear in the list. Click on it to check the text, the layout, and any links. Why Use smtp4dev? It is safe: You will never spam real people by accident.
It is fast: You do not need to wait for the real internet to deliver the message. It is free: It costs nothing to use and works offline. To help you get everything configured correctly, tell me:
What programming language or framework (like Node.js, Python, or C#) are you using?
Do you prefer using Docker or running the app directly on your computer?
I can give you the exact code snippet you need to connect your app.
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