diff --git a/backend/mailgun/mailgun.js b/backend/mailgun/mailgun.js
new file mode 100644
index 0000000..594b5d4
--- /dev/null
+++ b/backend/mailgun/mailgun.js
@@ -0,0 +1,30 @@
+const mailgun = require("mailgun-js");
+const DOMAIN = "sandboxb488ae9cba904e73936d81f35b2ee781.mailgun.org";
+const mg = mailgun({
+	apiKey: "d05c4d067d69c940d3dac93769dd87a2-fe066263-f6136332",
+	domain: DOMAIN
+});
+
+const sendInvite = async (newUser, email, familyName, inviteLink) => {
+  const data = {
+    from: "Mailgun Sandbox <postmaster@sandboxb488ae9cba904e73936d81f35b2ee781.mailgun.org>",
+    to: email,
+    subject: "Welcome to BTC Family!",
+    text: 
+      `Hi ${newUser}, 
+        You are invited to join the ${familyName} family wallet!
+
+        Click here: ${inviteLink} to accept your invitation!
+      `
+  };
+
+  await mg.messages().send(data, function (error, body) {
+    if (error) {
+      console.error("Invite failed:", error)
+    } else {
+      console.log("Invite success:", body);
+    }
+  });
+}
+
+export { sendInvite }
\ No newline at end of file
diff --git a/backend/package.json b/backend/package.json
index 8b59e4b..2022927 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -18,6 +18,7 @@
     "express": "^4.17.3",
     "firebase-admin": "^10.0.2",
     "http-errors": "^2.0.0",
+    "mailgun-js": "^0.22.0",
     "morgan": "^1.10.0",
     "nodemon": "^2.0.15",
     "opennode": "^1.3.0",