We are building a site in Magento (v1.4.0) for a client and need to enable USPS shipping in the cart. This has been partially done. The client has requested 3 shipping methods (Priority Mail - Domestic, Priority Mail Package - International, First Class Package - International).
Currently we have Priority Mail working but only for residents in the Origin Shipping State. This means the client is in Austin, TX so all residents of Texas are allowed to select Priority Mail in Get a Shipping Quote or in the Checkout. All residents without a Texas zip code receive the "This shipping method is currently unavailable. If you would like to ship using this shipping method, please contact us" error. If the Origin Shipping State is changed to another state (Florida for example) all residents of THAT state now are displayed Priority Mail and all others receive the error message.
Basically our USPS integration is not working. We need assistance completing this.
Please do not bid on this project if you do not have prior experience successfully installing USPS into Magento v1.4.0 and resolving bugs in relation to this.