The MailOne 2.0 software for PostBase allows users to save on postage costs by with Commercial Base Pricing and electronic Certified and Return Receipts. MailOne 2.0 features advanced operating, accounting, reporting and tracking for PostBase. MailOne's all-in-one label includes the postage, address and USPS confirmation bar codes on a single 4" x 6" label, speeding up the shipping process. MailOne 2.0 features an integrated address book that can import addresses from a standard spreadsheet