diff --git a/.github/workflows/scripts/notify-nightly-failure.js b/.github/workflows/scripts/notify-nightly-failure.js
deleted file mode 100644
index 53e47c4fcb7..00000000000
--- a/.github/workflows/scripts/notify-nightly-failure.js
+++ /dev/null
@@ -1,38 +0,0 @@
-#! /usr/bin/env node
-
-const sgMail = require("@sendgrid/mail");
-sgMail.setApiKey(process.env.SENDGRID_API_KEY);
-
-const msg = {
-  to: `${process.env.SENDGRID_MAIL_TO}`,
-  from: `${process.env.SENDGRID_MAIL_FROM}`,
-  subject: "🚨 Nightly Workflow Failed",
-  text: `
-    Nightly Trigger workflow has failed, see details:
-
-    - Workflow: ${process.env.GITHUB_WORKFLOW}
-    - Repository: ${process.env.GITHUB_REPOSITORY}
-    - Run Number: ${process.env.GITHUB_RUN_NUMBER}
-    - Logs: ${process.env.GITHUB_SERVER_URL}/${process.env.GITHUB_REPOSITORY}/actions/runs/${process.env.GITHUB_RUN_ID}
-  `,
-  html: `
-    <p>Nightly Trigger workflow has failed, see details:</p>
-    <ul>
-      <li><strong>Workflow :</strong> ${process.env.GITHUB_WORKFLOW}</li>
-      <li><strong>Repository :</strong> ${process.env.GITHUB_REPOSITORY}</li>
-      <li><strong>Run Number :</strong> #${process.env.GITHUB_RUN_NUMBER}</li>
-      <li><strong>Logs :</strong> <a href="${process.env.GITHUB_SERVER_URL}/${process.env.GITHUB_REPOSITORY}/actions/runs/${process.env.GITHUB_RUN_ID}">Check logs</a></li>
-    </ul>
-  `,
-};
-
-sgMail
-  .send(msg)
-  .then(() => {
-    console.log("Mail sent successfully");
-    console.log("Message details:", msg);
-  })
-  .catch((error) => {
-    console.error("Error sending email:", error);
-    process.exit(1);
-  });
diff --git a/.github/workflows/test-notify-on-failure.yml b/.github/workflows/test-notify-on-failure.yml
index 236bfb1503e..7fb3ccdf7ca 100644
--- a/.github/workflows/test-notify-on-failure.yml
+++ b/.github/workflows/test-notify-on-failure.yml
@@ -11,15 +11,26 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Make script executable
-        shell: bash
+      - name: Write HTML body to file
         run: |
-          chmod +x ./.github/workflows/scripts/notify-nightly-failure.js
+          cat > ./email-body.html <<EOF
+          <h3>Nightly Trigger workflow has failed, see details:</h3>
+          <ul>
+            <li><strong>Workflow :</strong> ${{ github.workflow }}</li>
+            <li><strong>Repository :</strong> ${{ github.repository }}</li>
+            <li><strong>Run Number :</strong> #${{ github.run_number }}</li>
+            <li><strong>Logs :</strong> <a href="${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}">Check logs</a></li>
+          </ul>
+          EOF
 
-      - name: Send failure notification by email
-        uses: peter-evans/sendgrid-action@v1
-        env:
-          SENDGRID_API_KEY: ${{ secrets.SENDGRID_API_KEY }}
-          SCRIPT_FILEPATH: ./.github/workflows/scripts/notify-nightly-failure.js
-          SENDGRID_MAIL_FROM: ${{ secrets.CI_NOTIFICATION_EMAIL_FROM }}
-          SENDGRID_MAIL_TO: ${{ secrets.CI_NOTIFICATION_EMAIL_TO }}
+      - name: Send failure notification via Mailgun
+        uses: dawidd6/action-send-mail@v6
+        with:
+          server_address: ${{ vars.CI_NOTIFICATION_SMTP_SERVER }}
+          server_port: ${{ vars.CI_NOTIFICATION_SMTP_PORT }}
+          username: ${{ secrets.CI_NOTIFICATION_SMTP_LOGIN }}
+          password: ${{ secrets.CI_NOTIFICATION_SMTP_PASSWORD }}
+          subject: "🚨 Nightly Workflow Failed"
+          to: ${{ secrets.CI_NOTIFICATION_EMAIL_TO }}
+          from: ${{ secrets.CI_NOTIFICATION_EMAIL_FROM }}
+          html_body: file://email-body.html