Print List of Labels

We are using our own software to generate barcodes and we later scan those barcodes with ShipRush to query our database and print the labels.

Is it possible to print labels without using ShipRush Discount Postage and USPS? Ideally, we would like our software to prints all the labels at once when we generate the barcodes rather than switching between the two softwares.

Regards,

Photage