If you send updates, newsletters or offers to your contacts, they must contain a relevant message for the recipient to appreciate it. That means you need to keep track of everyone in your database and customize the mail to their area of interest. Or, you can let Infusionsoft with its Marketing Automation Functionality integrated with behavioral CRM keep track for you. You can segment contacts into different lists based on actions like opened, clicked, purchased, payment history and other behaviors (not just demographic data). Send personalized, relevant messages automatically, delivering the right message to the right person at the right time, without having to manually write new e-mails each time.