- The ability to add custom icons.- Very useful when you receive an unknown email (it has a very suspicious look). It's like "maybe it's some sort of scam?" However, after clicking through it just reveals that it is not a scam at all. If this is important, I would only turn off notifications or just block them.I'm sure if they wanted to, they can find out how often I turn notifications on/off. So I have no way to see what kind of emails I am missing. And they definitely don't care about myβ¦