Post Offices in Braintree, Massachusetts, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Braintree Post Office No Reviews Favorite Fax: (781) 843-9297Phone: (781) 356-4569Retail Hours Braintree Carrier Annex Post Office No Reviews Favorite Fax: (781) 356-1732Phone: (781) 356-3912Retail Hours