LOS ANGELES, CA, Jun 08, 2010 – Stamps.com, the leading provider of postage online and USPS shipping software solutions for approximately 400,000 customers, today announced its new USPS shipping integration with Zen Cart, the popular open source e-commerce shopping cart software.

With the new Stamps.com integration, Zen Cart users can import customer order data and print shipping labels for all USPS mail classes, domestic or international. Plus Stamps.com will automatically post order status details (tracking number, ship date, mail class) back to the Zen Cart database.

Stamps.com has proven to be a valuable tool for many e-commerce merchants, allowing users to manage and fulfill orders from eBay(R), Yahoo! Merchant, Google Checkout(TM), PayPal(R) Shops plus their own web store, all from one interface.

Additional Stamps.com features include hidden postage, insurance discounts, batch printing and thermal printer support. Plus Stamps.com has a return shipping label feature that allows customers to easily request a pre-paid shipping label for return of merchandise.

“Zen Cart and Stamps.com are a perfect fit,” said Stamps.com president and CEO Ken McBride. “When you combine the flexibility and ease-of-use of Zen Cart with the power and simplicity of the Stamps.com USPS shipping software you have a complete e-commerce solution, from customer order placement to product delivery.”