Hi All, I am starting to look at adding the ability for customer's of our proprietry software, to add lists/email accounts from an option inside our software suite.  This is not a web based app. .     I have read that we need a redirect URL etc for multiple customers, however, snce this is not a web based app, I am not sure how to proceed.   So, if: 1. Each of our customers will have there own Constant Contact account 2. Access to adding list name/email account will be availbale from a non web based app running on a private server owned by the customer.   (I am looking to use command line PHP).   How would I go about with the authorization for each customer?   ... View more