Protocol for use of addresses in a data base used for mailing campaigns has a addresses erased after predetermined number of uses

摘要

A computer based mailing system has a facility to enter an address list which is then converted into code and is then entered into a data base. The number of uses of a specific address is tracked by incrementing a counter after each use. When the count value reaches a specified threshold the address is erased from the data base for the purpose of future mailing campaigns.