title: Azure event hub sending duplicate events
body: <p>I am using azure event hub to receive notification on arrival of messages in inbox.</p>
  <p>When I send an email without attachment I receive only one notification from event hub.</p>
  <p>When I send an email with attachment I receive two notifications.</p>
  <p>I have activated &quot;Defender with Safe Attachments Dynamic Delivery&quot; for my azure tenant.</p>
  <p>Please advise me why is this happening.</p>