Stamps.com Engineers have fixed the technical issue and all systems are functioning normally. Thank you for your patience.
Our Engineers have identified an issue that may affect some of our customers' ability to login into their Stamps.com account. We are working to quickly resolve this issue and will provide an update when it is available. We apologize for the inconvenience.
This incident affected: Stamps.com Online (Printing Postage Using a Web Browser), Stamps.com Software (Printing Postage Using our Windows Application), Stamps.com API (SWS/Web Services), and Stamps.com Reporting Tools (Postage History, Refunds & SCAN Forms).