Post Office – Keith, Newmill – Opening Hours & Branch Details Post Office occupies a prime spot at 63 Main Street, approximately 1.06 miles north of the centre of Keith (a few minutes walk from Keith Grammar School and Newmill Primary School). The branch is fittingly located for patrons from Mulben, Fife Keith, Aultmore, Keith Town Centre, Knock and Newmill. If you’d like to visit today (Friday), it’s open from 12:30 pm to 2:00 pm. This page will provide you with all the information you need on Post Office Keith, Newmill, including the business hours, location details, telephone number and other relevant info.