Robert,

If you look at the almost daily updates to the Stamps.com ecommerce package, you'll see that nearly all changes are to the Magento files and very few changes to the zen-cart files which shows where the programming resources are being directed.

I don't have a problem with the Stamps.com email notices vs from within Zen-cart. I do have issue with Stamps.com was SPAMMING our customers with their adverts. I had assumed that the notices were clones of the USPS notifications.