I've tried searching everywhere, & I cannot find a solution to this problem. I have a contact who shows up in my Chat list on the left of my Gmail, who I would like to remove. He has two e-mail addresses, one gmail, the other is @una.edu (his college address). I've tried deleting him entirely, but the latter address still shows up in my Gmail Chat list, to my frustration. He never uses that address anymore, so I desperately want to unclutter the list by taking it off. There is no option to block, remove, or set it to "never show", so I'm coming here for help. Hope you all can help me out!