The e-mail subscription management options available out of the box with Infusionsoft are limited because they do not show current subscription status.
Traditionally, Infusionsoft users use tags to track someone’s e-mail subscription. However, if we use a custom field to track subscription status, we can build a web form that operates like a true e-mail preference center.
Infusionsoft Cookbook – Chapter 8.4 – Creating A True E-mail Preferences Center
