My old Mum always told me to take the pot to the kettle, not the kettle to the pot. So I always use boiling water. Also you should never add the milk to the tea bag first...a hanging offence in my house.
I have told this story before on AB but here goes ::
Once, in America, while staying with friends, I visited some friends of theirs, who had never met an Englishman before. The host was somewhat nervous of making me tea but didn't do too badly. But she blotted her copy book by asking me if I wanted cream or lemon.
"Cream...in tea ? " I gasped, in a horrified voice.
Americans have some very funny ideas you know.