title: How can I send image in subject line in Gmail?
body: <p>I'm trying to send an email and it should display subject line like below.</p>
  
  <p><a href="https://i.stack.imgur.com/LoAei.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LoAei.png" alt="enter image description here"></a></p>
  
  <p>I tried to put image in subject line but it won't work.<br>
  I also googling but unable to find any solution.
  <br>Is anyone know how to do it ? <br>
  Thank you.</p>