Computerized system and method for linking a user's e-mail that tracks a user's interest and activity

A computerized system to link a user's e-mail openings and click throughs on said user's e-mail address to said user's online click stream that tracks said user's interests and activity behavior data on said user's destination websites, comprising:

• a dedicated tracking sub domain;
• a programmable tracking code and beacon embeddable on said destination site to track said user's interests and activity behavior data and update said user's profile;
• a custom user-unique domain tracking cookie that is generated and tied to said user's e-mail address when said user clicks on a rewritten-link shared by said tracking sub domain;
• a customizable tagging engine;
• and
• a template engine to create a plurality of templates utilized within said system.

A computer software method for linking a user's e-mail openings and click throughs on said user's e-mail to said user's online click stream and which tracks said user's interests and activity behavior data on websites visited by the said user utilized with a computerized system, comprising:

• generating a unique domain tracking cookie that is tied to an e-mail address when an end user clicks on a rewritten-link under a dedicated tracking shared sub domain;
• tracking said user on a destination site using a programmable tracking code on said destination site;
• tracking and updating said user interests and activity behavior data of said user using said tracking code;
• and
• taking said data to customize e-mails and said website to said user's interests and activity.