Twenty-two-year-old James Dickerson is accused of sending the bombs containing chemicals and a pressure cooker filled with thumbtacks to the 19-year-old's home in November 2017.
Nassau County police worked with the NYPD and federal investigators to arrest Dickerson and extradite him to Long Island.
Dickerson is charged with three counts of placing a false bomb or hazardous substance in the second degree and first-degree harassment.
He was arraigned on Friday.