In some examples, a computer-implemented method of managing an advertising exchange is provided. The method uses email data and provides an interactive user interface for controlling management of data in an email channel. One or more inputs of online audience data is received. The online audience data includes email channel inventory from multiple publishers, Offline audience data including offline shopping behavior is sourced from at least one or more offline source. The online audience data and the offline audience data is included in a unified customer database, and the interactive user interface includes interface elements selectable to present online and offline audience data sourced from the unified customer database.