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📧 IIT Gmail Microsite SPAM Filter (Google Apps Script)

This Google Apps Script filters your Gmail Inbox to find emails that contain links to sites.google.com, even if they are masked behind custom text like "Click Here". It then:

• Labels those emails under a folder called Microsite
• Archives them to remove from the Inbox
• Keeps your inbox clean from unwanted promotional website links

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🎓 Who Is This For?

This script is made specifically for IIT (Institute of Information Technology) students who want to automatically filter out emails that promote personal websites using Google Sites. No coding knowledge is required — just copy, paste, and set it up!

🚀 What It Does

✅ Detects:

• Visible links like https://sites.google.com/...
• Masked links like [Click Here](https://sites.google.com/view/project/home)

✅ Automatically:

• Labels the email as Microsite
• Moves it out of the Inbox (archived)
• Runs on all Inbox emails received in the last 30 days

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🛠️ How to Install and Use

You don't need to deploy anything. Just follow the steps below.

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🔧 Step 1: Open Google Apps Script

1. Go to https://script.google.com
2. Click + New project
3. Name your project (e.g., Microsite Link Filter)

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📋 Step 2: Copy and Paste the Script

Replace the default Code.gs content with the code below:

function detectAllGoogleSiteLinks() {
  const threads = GmailApp.search('in:inbox newer_than:30d'); // configure the dates you need to scrap
  const label = GmailApp.createLabel("Microsite"); // Label Folder change it desired name

  threads.forEach(thread => {
    const messages = thread.getMessages();
    messages.forEach(message => {
      const htmlBody = message.getBody();

      // Simple match: visible or raw URLs
      if (htmlBody.includes("sites.google.com")) {
        applyMicrositeLabelAndArchive(thread, label);
        Logger.log("Found direct site.google.com link in: " + message.getSubject());
        return;
      }

      // Masked <a href> links
      const hrefRegex = /<a\s[^>]*?href=["'](https:\/\/sites\.google\.com\/[^"']+)["'][^>]*?>.*?<\/a>/gi;
      let match;
      while ((match = hrefRegex.exec(htmlBody)) !== null) {
        const foundUrl = match[1];
        if (foundUrl.includes("sites.google.com")) {
          applyMicrositeLabelAndArchive(thread, label);
          Logger.log("Found masked link to: " + foundUrl + " in: " + message.getSubject());
          break;
        }
      }
    });
  });
}

// Label thread and remove from Inbox
function applyMicrositeLabelAndArchive(thread, label) {
  const existingLabels = thread.getLabels().map(l => l.getName());
  if (!existingLabels.includes(label.getName())) {
    thread.addLabel(label);
  }
  thread.moveToArchive(); // removes it from Inbox
}

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▶️ Step 3: Run the Script Once

1. Click the ▶️ Run button (in the top toolbar)
2. It will prompt you for authorization — allow permissions for Gmail
3. The script will scan your Inbox for sites.google.com links and start filtering

⏰ Step 4: Schedule It to Run Automatically (Optional)

1. In the Apps Script editor, click the clock icon (Triggers)
2. Click + Add Trigger
3. Configure:
   • Function: detectAllGoogleSiteLinks
   • Event source: Time-driven
   • Type: Day timer
   • Time of day: e.g., 7:00am to 8:00am

This will automatically run the filter every morning.

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📂 Where Do Filtered Emails Go?

• They are moved out of your Inbox
• You can find them under the Microsite label in Gmail

📌 Notes

• You can change "Microsite" to any label name you prefer
• You can update newer_than:30d to scan a different time range (like 10d or 1d)
• This script works only for the emails in your own Gmail account

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❌ To Stop It

If you no longer want to run the filter:

• Go to the Triggers tab and delete the trigger
• Or just delete the script project from your Apps Script dashboard

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✅ Requirements

• your IIT Gmail Account eg: spammer.2023233@iit.ac.lk

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