title: Send email with an avatar
body: <p>Few days ago I got an newsletter from an company to my Gmail address and I don't have this company in my contact list. Normally the avatar image is empty when you get some newsletter or email from someone that you don't have in your contact list but this time the company has set a avatar to their newsletter.</p>
  
  <p>Now to my question. Can I specify an image to be shown as an avatar on the emails I'll send from my website? If yes, how? </p>