The editors of the 1906 Jewish Encyclopedia implied that Malachi prophesied after Haggai and Zechariah and speculated that he delivered his prophecies about 420 BC, after the second return of Nehemiah from Persia, or possibly before his return. The Talmud and the Aramaic Targum of Yonathan ben Uzziel identify Ezra as the same person as Malachi. This is the traditional view held by most Jews and some Christians, including Jerome.This identification is plausible, because "Malachi" reprimands the people for the same things Ezra did, such as marrying foreign pagan women. Malachi also focuses extensively on corrupt priests; which Ezra, a priest himself who exhorted the people to follow the law, despised
–Wikipedia