Patent ID: 8429235
Filing Date: 2013-04-23
Classification: H04L

Abstract:
1. A method of controlling electronic mail (e-mail) message transmission over a network comprised of: receiving, by a third entity, a first set of hash encoded e-mail addresses from a first entity, wherein said first set of hash encoded e-mail addresses represents e-mail addresses to which an e-mail message could be sent; compiling, by said third entity, a second set of hash encoded e-mail addresses, wherein said second set of hash encoded e-mail addresses represents e-mail addresses to which said e-mail message should not be sent; sorting said first set of hash encoded e-mail addresses into a first ordered list; sorting said second set of hash encoded e-mail addresses into a second ordered; comparing the first entry in said first ordered list to the first entry in said second ordered list then successive entries in said second ordered list, until the value of an entry in said second ordered list equals or exceeds the value of the first entry in said first list; and removing, by said third entity, from said first set of hash encoded e-mail addresses, each hash encoded e-mail address that is in said second set of hash encoded e-mail addresses thereby yielding a third set of hash encoded e-mail addresses, wherein said third set of hash encoded e-mail addresses represents e-mail addresses to which said e-mail message will be sent, wherein a second entity is a source of said e-mail message and wherein the first, second, and third entities are different entities.