feat: add STARTTLS support for SMTP proxy server (#876)

* feat: add STARTTLS support for SMTP proxy server Add smtp_tls_cert and smtp_tls_key environment variables to enable STARTTLS on the SMTP proxy server, matching existing IMAP TLS support. Closes #249 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * test: add E2E tests for SMTP/IMAP STARTTLS - Add smtp-proxy-tls service with self-signed certs in docker-compose - Add smtp-tls.spec.ts: SMTP STARTTLS send plain/HTML/auth tests - Add imap-tls.spec.ts: IMAP STARTTLS login/list/select/fetch tests - Register smtp-proxy project in playwright.config.ts - Wait for TLS proxy readiness in docker-entrypoint.sh Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix: enforce auth over TLS when STARTTLS is configured - Set auth_require_tls conditionally based on tls_context presence - Disable insecure SSLv2/SSLv3 protocols in TLS context Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> * fix: replace cert-gen service with inline cert generation The cert-gen one-shot container was exiting immediately after generating certificates, triggering --abort-on-container-exit and stopping all services before tests could run. Replace with an entrypoint script in smtp-proxy-tls that generates the self-signed cert before starting the proxy server. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
2026-09-06 16:07:14 +08:00 · 2026-03-06 15:05:29 +08:00
parent 8341cae28f
commit 8cf1150b15
14 changed files with 307 additions and 11 deletions
@@ -0,0 +1,114 @@
+import { test, expect } from '@playwright/test';
+import nodemailer from 'nodemailer';
+import {
+  createTestAddress,
+  deleteAddress,
+  deleteAllMailpitMessages,
+  requestSendAccess,
+  onMailpitMessage,
+} from '../../fixtures/test-helpers';
+
+const TLS_HOST = process.env.SMTP_PROXY_TLS_HOST || 'smtp-proxy-tls';
+const TLS_SMTP_PORT = parseInt(process.env.SMTP_PROXY_TLS_SMTP_PORT || '8026', 10);
+
+function createTlsTransport(user: string, pass: string) {
+  return nodemailer.createTransport({
+    host: TLS_HOST,
+    port: TLS_SMTP_PORT,
+    secure: false,
+    auth: { user, pass },
+    tls: { rejectUnauthorized: false },
+    requireTLS: true,
+  });
+}
+
+function createNoTlsTransport(user: string, pass: string) {
+  return nodemailer.createTransport({
+    host: TLS_HOST,
+    port: TLS_SMTP_PORT,
+    secure: false,
+    auth: { user, pass },
+    tls: { rejectUnauthorized: false },
+  });
+}
+
+test.describe('SMTP Proxy — STARTTLS', () => {
+  let jwt: string;
+  let address: string;
+
+  test.beforeAll(async ({ request }) => {
+    await deleteAllMailpitMessages(request);
+    ({ jwt, address } = await createTestAddress(request, 'smtp-tls'));
+    await requestSendAccess(request, jwt);
+  });
+
+  test.afterAll(async ({ request }) => {
+    await deleteAddress(request, jwt);
+  });
+
+  test('send plain text email via STARTTLS', async () => {
+    const subject = `SMTP TLS Plain ${Date.now()}`;
+    const listener = onMailpitMessage((m) => m.Subject === subject);
+    await listener.ready;
+
+    const transport = createTlsTransport(address, jwt);
+    const info = await transport.sendMail({
+      from: address,
+      to: 'recipient@test.example.com',
+      subject,
+      text: 'Hello from SMTP STARTTLS E2E test',
+    });
+    expect(info.accepted).toContain('recipient@test.example.com');
+
+    const delivered = await listener.message;
+    expect(delivered.Subject).toBe(subject);
+  });
+
+  test('send HTML email via STARTTLS', async () => {
+    const subject = `SMTP TLS HTML ${Date.now()}`;
+    const listener = onMailpitMessage((m) => m.Subject === subject);
+    await listener.ready;
+
+    const transport = createTlsTransport(address, jwt);
+    const info = await transport.sendMail({
+      from: address,
+      to: 'recipient@test.example.com',
+      subject,
+      html: '<h1>Hello</h1><p>STARTTLS HTML E2E test</p>',
+    });
+    expect(info.accepted).toContain('recipient@test.example.com');
+
+    const delivered = await listener.message;
+    expect(delivered.Subject).toBe(subject);
+  });
+
+  test('connection without STARTTLS still works', async () => {
+    const subject = `SMTP TLS NoForce ${Date.now()}`;
+    const listener = onMailpitMessage((m) => m.Subject === subject);
+    await listener.ready;
+
+    const transport = createNoTlsTransport(address, jwt);
+    const info = await transport.sendMail({
+      from: address,
+      to: 'recipient@test.example.com',
+      subject,
+      text: 'Hello without forced STARTTLS',
+    });
+    expect(info.accepted).toContain('recipient@test.example.com');
+
+    const delivered = await listener.message;
+    expect(delivered.Subject).toBe(subject);
+  });
+
+  test('auth with wrong password fails over STARTTLS', async () => {
+    const transport = createTlsTransport(address, 'wrong-password');
+    await expect(
+      transport.sendMail({
+        from: address,
+        to: 'recipient@test.example.com',
+        subject: 'Should fail',
+        text: 'This should not be sent',
+      })
+    ).rejects.toThrow();
+  });
+});