1823 L. Hunt in 2 339 The greatest provocation to write a hate-letter is in answer to a treacherous friend.
1906 June 50/2 I have sworn to write no more hate letters. All my letters henceforth shall be letters of love.
2007 (Nexis) 10 July (Sports section) c1 He receives hate letters. Ugly, angry, racist hate letters.