A system for introducing behaviorally tested live content (18) into an electronic mail message comprising at least one dynamic live content area (1006) sent through an e-mail service provider system (16) comprises memory and a click manager (28). The memory 5 includes behaviorally tested live content comprising image data. The click manager (28) receives an indication of the opening of the message by a recipient, whereupon the click manager (28) accesses the memory to retrieve behaviorally tested live content (18) and send the retrieved behaviorally tested live content (18) for rendering in the dynamic live content area (1006) of the electronic mail message opened by the one of the plurality of 0 recipients.