Described is a method for generating a dynamic mailing list with the following steps: (a) comparing a source mailing list to an established mailing list, the source mailing list including a mailing address to which a sender desires to send a message; (b) when the mailing address is included in the established mailing list, making a preliminary determination to add the mailing address to the dynamic mailing list; and (c) when the mailing address is not included in the established mailing list, processing the mailing address according to a procedure defined by an add rule for adding the mailing address to the established mailing list. Also described is a system with the following components: (a) a storage arrangement; and (b) a processing arrangement obtaining (i) a source mailing list including a mailing address to which a sender desires to send a message and (ii) an add rule which determines whether the mailing address is to be added to an established mailing list, the processing arrangement storing the source mailing list, the established mailing list and the add rule in the storage arrangement, wherein when the mailing address is included in the established mailing list, the processing arrangement makes a preliminary determination to add the mailing address to the dynamic mailing list, and wherein when the mailing address is not included in the established mailing list, the processing arrangement processes the mailing address according to the add rule.