It's had it's first major test as most of my spam arrives overnight - blooming great, sorted totally accurately with 2 real emails into inbox remainder into Qurb box which I then cleared.
What is the "block" function used for and how do I use it? I can guess it's to block emails from being received in the first place thus they won't appear in the inbocx or Qurb box but I can't see how to use it? Anyway I'm happy enough for the basic process i.e for spam to simply drain through to the Qurb box leaving my inbox with legit stuff.