diff --git a/src/queues/email-send.worker.test.ts b/src/queues/email-send.worker.test.ts
new file mode 100644
index 0000000..c599936
--- /dev/null
+++ b/src/queues/email-send.worker.test.ts
@@ -0,0 +1,120 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+
+vi.mock('../server/db/campaigns', () => ({
+  getCampaign: vi.fn(),
+}))
+vi.mock('../server/suppression/check', () => ({
+  checkSuppression: vi.fn(),
+}))
+vi.mock('../server/smtp/client', () => ({
+  sendEmail: vi.fn(),
+}))
+vi.mock('../server/clickhouse/client', () => ({
+  clickhouse: { insert: vi.fn().mockResolvedValue(undefined) },
+}))
+
+import { processEmailSendJob } from './email-send.worker'
+import { getCampaign } from '../server/db/campaigns'
+import { checkSuppression } from '../server/suppression/check'
+import { sendEmail } from '../server/smtp/client'
+import { clickhouse } from '../server/clickhouse/client'
+
+const mockCampaign = {
+  id: 'campaign-1',
+  subject: 'Newsletter April',
+  htmlBody: '<p>Hallo</p>',
+  plainBody: 'Hallo',
+  name: 'April Newsletter',
+  status: 'sending' as const,
+  scheduledAt: null,
+  cronExpression: null,
+  createdAt: new Date(),
+  updatedAt: new Date(),
+}
+
+const jobData = {
+  tenantId: 'tenant1',
+  campaignId: 'campaign-1',
+  recipientEmail: 'empfaenger@example.com',
+  recipientHash: 'abc123hash',
+}
+
+describe('processEmailSendJob', () => {
+  beforeEach(() => vi.clearAllMocks())
+
+  it('sendet E-Mail wenn nicht suppressed', async () => {
+    vi.mocked(getCampaign).mockResolvedValue({ ok: true, data: mockCampaign })
+    vi.mocked(checkSuppression).mockResolvedValue(false)
+    vi.mocked(sendEmail).mockResolvedValue({ ok: true, data: undefined })
+
+    const result = await processEmailSendJob(jobData)
+
+    expect(result.ok).toBe(true)
+    expect(sendEmail).toHaveBeenCalledOnce()
+    expect(clickhouse.insert).toHaveBeenCalledOnce()
+  })
+
+  it('überspringt SMTP wenn Empfänger suppressed ist', async () => {
+    vi.mocked(getCampaign).mockResolvedValue({ ok: true, data: mockCampaign })
+    vi.mocked(checkSuppression).mockResolvedValue(true)
+
+    const result = await processEmailSendJob(jobData)
+
+    expect(result.ok).toBe(true)
+    expect(sendEmail).not.toHaveBeenCalled()
+    expect(clickhouse.insert).toHaveBeenCalledWith(
+      expect.objectContaining({
+        values: expect.arrayContaining([
+          expect.objectContaining({ event_type: 'suppressed' }),
+        ]),
+      })
+    )
+  })
+
+  it('gibt err zurück wenn Kampagne nicht gefunden', async () => {
+    vi.mocked(getCampaign).mockResolvedValue({ ok: false, error: new Error('nicht gefunden') })
+
+    const result = await processEmailSendJob(jobData)
+
+    expect(result.ok).toBe(false)
+    if (!result.ok) expect(result.error.message).toContain('nicht gefunden')
+  })
+
+  it('gibt err zurück wenn SMTP fehlschlägt', async () => {
+    vi.mocked(getCampaign).mockResolvedValue({ ok: true, data: mockCampaign })
+    vi.mocked(checkSuppression).mockResolvedValue(false)
+    vi.mocked(sendEmail).mockResolvedValue({ ok: false, error: new Error('SMTP-Fehler') })
+
+    const result = await processEmailSendJob(jobData)
+
+    expect(result.ok).toBe(false)
+    if (!result.ok) expect(result.error.message).toBe('SMTP-Fehler')
+  })
+
+  it('ClickHouse-Event enthält recipient_hash (kein Klartext)', async () => {
+    vi.mocked(getCampaign).mockResolvedValue({ ok: true, data: mockCampaign })
+    vi.mocked(checkSuppression).mockResolvedValue(false)
+    vi.mocked(sendEmail).mockResolvedValue({ ok: true, data: undefined })
+
+    await processEmailSendJob(jobData)
+
+    const insertCall = vi.mocked(clickhouse.insert).mock.calls[0][0]
+    const eventValue = (insertCall.values as Array<Record<string, unknown>>)[0]
+    expect(eventValue.recipient_hash).toBe('abc123hash')
+    expect(JSON.stringify(eventValue)).not.toContain('empfaenger@example.com')
+  })
+
+  it('sendEmail erhält List-Unsubscribe-Header', async () => {
+    vi.mocked(getCampaign).mockResolvedValue({ ok: true, data: mockCampaign })
+    vi.mocked(checkSuppression).mockResolvedValue(false)
+    vi.mocked(sendEmail).mockResolvedValue({ ok: true, data: undefined })
+
+    await processEmailSendJob(jobData)
+
+    expect(sendEmail).toHaveBeenCalledWith(
+      expect.objectContaining({
+        listUnsubscribeHeader: expect.stringContaining('unsub'),
+      })
+    )
+  })
+})
diff --git a/src/queues/email-send.worker.ts b/src/queues/email-send.worker.ts
new file mode 100644
index 0000000..820c2b3
--- /dev/null
+++ b/src/queues/email-send.worker.ts
@@ -0,0 +1,71 @@
+import { Worker } from 'bullmq'
+import { getCampaign } from '../server/db/campaigns'
+import { checkSuppression } from '../server/suppression/check'
+import { sendEmail } from '../server/smtp/client'
+import { clickhouse } from '../server/clickhouse/client'
+import { ok, err, type Result } from '../lib/result'
+import type { EmailSendJobData } from './email-send.queue'
+
+export async function processEmailSendJob(data: EmailSendJobData): Promise<Result<void>> {
+  const campaignResult = await getCampaign(data.tenantId, data.campaignId)
+  if (!campaignResult.ok) return err(campaignResult.error)
+  const campaign = campaignResult.data
+
+  // Suppression-Check ist PFLICHT — kein Opt-out-Empfänger darf E-Mail erhalten
+  const suppressed = await checkSuppression(data.tenantId, data.recipientEmail)
+  if (suppressed) {
+    await insertEvent('suppressed', data)
+    return ok(undefined)
+  }
+
+  const appUrl = process.env.APP_URL ?? 'http://localhost:3000'
+  const unsubUrl = `${appUrl}/unsub?tid=${data.tenantId}&cid=${data.campaignId}&r=${data.recipientHash}`
+
+  const sendResult = await sendEmail({
+    to: data.recipientEmail,
+    subject: campaign.subject,
+    html: campaign.htmlBody,
+    text: campaign.plainBody,
+    listUnsubscribeHeader: `<${unsubUrl}>`,
+  })
+
+  if (!sendResult.ok) return err(sendResult.error)
+
+  await insertEvent('sent', data)
+  return ok(undefined)
+}
+
+async function insertEvent(eventType: string, data: EmailSendJobData): Promise<void> {
+  await clickhouse.insert({
+    table: 'email_events',
+    values: [
+      {
+        event_type: eventType,
+        tenant_id: data.tenantId,
+        campaign_id: data.campaignId,
+        // Datenschutz: nur Hash wird gespeichert — keine Klartext-E-Mail-Adresse in ClickHouse
+        recipient_hash: data.recipientHash,
+        timestamp: new Date().toISOString(),
+        metadata: {},
+      },
+    ],
+    format: 'JSONEachRow',
+  })
+}
+
+const connection = {
+  host: process.env.REDIS_HOST ?? 'localhost',
+  port: Number(process.env.REDIS_PORT ?? 6379),
+}
+
+// Worker nur außerhalb von Tests starten
+if (process.env.NODE_ENV !== 'test') {
+  new Worker<EmailSendJobData>(
+    'email-send',
+    async (job) => {
+      const result = await processEmailSendJob(job.data)
+      if (!result.ok) throw result.error
+    },
+    { connection, concurrency: 10 }
+  )
+}