1. A computerized subscriber list system for use on a network including a server with a processor and a memory, comprising: a database stored in a non-transitory computer-readable media within the server memory having customer profile data where each customer record includes an email address, a subscriber preference setting, and an online product shopping behavior for each customer; a software module containing program code which when executed by the processor in the server causes the server to perform operations of building a subscriber list query from the customer profile data using multi-part rules to identify target customers that meet particular criteria based on (i) a subscriber preference setting, (ii) an online product shopping behavior, (iii) recency and frequency of purchase, (iv) options based on customer characteristics and profile data, saving the subscriber list query in a library stored in the server memory, and creating a new subscriber list automatically as matching subscriber records and data are added to the database based on the subscriber list query saved in the library a statistics module allowing the viewing of statistics related to the matching records; and an email campaign manager containing program code which when executed by the processor in the server causes the server to perform operations of sending a personalized message over the network to a customer identified from the new subscriber list which was updated automatically as subscriber records and data are added to the database so that any personalized message sent over the network will be current and relevant to an identified customer.