Now you have the ability to provide Real-Time United States Postal Service rates for shipping. By default, Yahoo! only offers UPS as a shipping provider. We will integrate these options for you so you can provide all the USPS shipping options you want in addition to UPS. All options will have Real-Time rates both domestically and internationally.
If you would like to add FedEX Real-Time rates in addition to USPS and UPS, you may be interested in the
Advanced Shipping Manager
UPS, USPS and FedEx Real-Time rates are just a few of the 21 standard
available with the Advanced Shipping Manager.