Generally we recommend: Fruit Teas - 212°F for 5-7 min. Herbal Teas - 212°F for 5-7 min. Black Teas - 212°F for 3-5 min. Oolong - 195°F for 2-3 min. Green - 180°F for 2-3 min. White - 180°F for 3-4 min.
However we have the Steeping Guidelines for each tea on its product page so you can search for your tea in the shop and check.