We utilize an in-house proprietary tracking system to provide complete reporting that details the number of recipients that opened your message, as well as the number of recipients that clicked thru to your website, broken down by URL. When a recipient opens an email, the images must be pulled from our server allowing us to capture whether an open has in fact occurred. All links in the creative contain an invisible redirect, meaning the recipient actually pings our server before ending up at the destination URL. There is no break in the user experience for the recipient.