Bugzilla

(In reply to Alessandro Castellani [:aleca] from comment #95)
> *a clear visual separation between known and unknown senders. In the future, we want to explore a more "clear" way to show an address saved in address book against one that it's known but it was dynamically collected. But this is all future exploration to improve UI.*

I have opened bug 1899005 as a place to collect ideas for this UI improvement.
You are all welcome to submit your ideas there.

(In reply to Alessandro Castellani [:aleca] from comment #95)
> *a clear visual separation between known and unknown senders. In the future, we want to explore a more "clear" way to show an address saved in address book against one that it's known but it was dynamically collected.*

I am offering an enhancement idea in bug 1899005 : add the existing gray/blue/(yellow) status icon to message list