title: Support email format: plain-text or HTML?
body: <p>I have to send planned support notification emails on system events (service window, alerts, etc). I see that most of such emails I receive from my vendors are in plain text format.</p>
  
  <p>I wonder should I to stick to plain text format as well (with accompanied limitations)  or provide HTML based one with better visualization? </p>
  
  <p>I am aware of limited HTML rendering capabilities of different email clients, but I suppose that not complex HTML with images will be OK.</p>