Mail Boxes are located adjacent to the upper parking lot next to the garage as you enter the lake. Mail Boxes are administered by the United States Postal Service. Each residence within Lake Wallkill is assigned a box and a key that is issued by the USPS. There is a mailbox for outgoing mail located in this same area. Members are asked to help police this area as it is subject to litter from discarded junk mail. If you have a problem with your mailbox, please contact the Sussex Post Office at 973-875-7410.