Prelude Research Email verification Email checker | NeverBounce The most accurate and popular Prelude Research's email format is first [1 letter] + last [1 letter] (ex JS@preludesecurity com) Prelude Research also uses first (ex John@preludesecurity com) and first [1 letter] + last (ex JSmith@preludesecurity com) as email structures Prelude Research's uses up to 3 different email patterns