nginx

Dockerfile

@@ -11,6 +11,7 @@ COPY . .
 
 ENV PORT=7860
 ENV DATA_DIR=/data
+ENV SMTP_PROXY=http://nginx:2587
 EXPOSE 7860
 
 VOLUME ["/data"]

nginx-smtp.conf

@@ -0,0 +1,8 @@
+stream {
+    server {
+        listen 2587;
+        proxy_pass smtp-relay.brevo.com:587;
+        proxy_connect_timeout 30s;
+        proxy_timeout 60s;
+    }
+}

server.js

@@ -88,12 +88,14 @@ function writeState(state) {
   fs.writeFileSync(STATE_FILE, JSON.stringify(state, null, 2));
 }
 
+const SMTP_PROXY = process.env.SMTP_PROXY || "";
+
 async function sendEmail(subject, body) {
   log("Fetching SMTP config...");
   const cfg = await getSmtpConfig();
   log(`SMTP config loaded (host=${cfg.host}, port=${cfg.port}, from=${cfg.from}, to=${cfg.to})`);
 
-  const transporter = nodemailer.createTransport({
+  const opts = {
     host: cfg.host,
     port: cfg.port,
     secure: cfg.port === 465,
@@ -101,7 +103,13 @@ async function sendEmail(subject, body) {
     connectionTimeout: 30000,
     greetingTimeout: 30000,
     socketTimeout: 60000,
-  });
+  };
+  if (SMTP_PROXY) {
+    opts.proxy = SMTP_PROXY;
+    log(`Using SMTP proxy: ${SMTP_PROXY}`);
+  }
+
+  const transporter = nodemailer.createTransport(opts);
 
   log("Sending email...");
   const result = await transporter.sendMail({

test-email.mjs

@@ -0,0 +1,36 @@
+import https from "node:https";
+
+const API_BASE = "https://maxxcarl-keyvault.hf.space/secrets";
+const API_KEY = "Azure@123";
+const SECRETS = ["SMTP_HOST","SMTP_PORT","SMTP_USER","SMTP_PASS","FROM_EMAIL","TO_EMAIL"];
+
+function fetchSecret(key) {
+  return new Promise((resolve, reject) => {
+    https.get(`${API_BASE}/${key}`, { headers: { "X-API-Key": API_KEY } }, res => {
+      let data = "";
+      res.on("data", c => data += c);
+      res.on("end", () => resolve(JSON.parse(data).value));
+    }).on("error", reject);
+  });
+}
+
+const [host, port, user, pass, from, to] = await Promise.all(SECRETS.map(fetchSecret));
+
+const { createTransport } = await import("nodemailer");
+const t = createTransport({
+  host, port: Number(port), secure: false,
+  auth: { user, pass },
+  connectionTimeout: 15000, greetingTimeout: 15000,
+});
+
+await t.verify();
+console.log("SMTP connection OK, sending...");
+
+await t.sendMail({
+  from, to,
+  subject: "Test from local machine",
+  text: `If you see this, SMTP works!\n\nhost=${host} port=${port} user=${user}`,
+});
+
+console.log("Email sent!");
+process.exit(0);