By default, you will get a free Teapplix USPS account with discounted rate. It does not require you to install any client programs. Labels are generated as pdf documents from our web page and printed to your printer.
We also integrate with Endicia Label Server API and Stamps.com, if you have an account with them and need to use it, please contact Teapplix Support to turn that option on.
We recommend that you shouldn’t print more than 200 orders at a time. This will allow you to have better response and also prevents major issues while printing which can be a problem with large batches.