1. A method of determining a probable owner of a personal store file in a computer, the method comprising: receiving a set of user-specified factors including a first number of most frequently occurring addresses and a second number of sent-then-received electronic messages to be analyzed for said first number of most frequently occurring addresses; determining the first number of most frequently occurring addresses among the second number of sent-then-received electronic messages within said personal store file; applying a weight to each of said first number of determined most frequently occurring addresses based on a number of occurrences of each of said first number of determined most frequently occurring addresses and one or more user-specified factors of the set of user-specified factors; determining a relative weight of each of said first number of determined most frequently occurring addresses; determining if any of said first number of determined most frequently occurring addresses are duplicate addresses; summing the relative weights of duplicate addresses to create a combined relative weight and setting the relative weight of one of the duplicate address to the combined relative weight; returning a top weighted address of said first number of determined most frequently occurring addresses as said probable owner of said personal store file with a confidence factor derived from the relative weight and the set of user-specified factors.