While not really a check list this page was created as a reference from which to base a postage estimate on. You can always call of course if you are not sure how to estimate but we have included a few tips. The USPS offers a work sharing discount when you drop your mail off at different types of distribution centers. The most common we work with are the SCF and the DDU. If we are entering your mail at the St. Louis post office (18th & Market) you will receive the SCF rate for all mail where the zip codes begin with the following 3 digits - 620, 622, 630, 631, 633. The DDU rate is only available for flat sized mail  for zip codes within a carrier route mailing that are serviced by the post office where the mailing is deposited (ex. Ballwin has 63011 and 63021).  Each rate level for postcards and letters has a 150 piece minimum except for the Mixed AADC level. For flats the minimum is 125 pieces or 15 lbs.

For a listing of current postage rates, please click here (to be updated).