Abstract: A communication network is described that allows legacy devices to access an IMS network. The communication network includes a switching system, an IMS network, and a non-IMS network. The switching system includes a subscriber database that is pre-provisioned with identities of IMS subscribers using legacy devices. When in operation, a calling party places a call through a legacy device. The switching system receives the call and accesses the subscriber database based on a calling party identifier (e.g., a phone number, URL, etc) to determine if the calling party is an IMS subscriber. If the calling party is an IMS subscriber, then the switching system routes the call to the IMS network. If the calling party is not an IMS subscriber, then the switching system routes the call to the non-IMS network.

Abstract: Systems and methods are provided for excluding one or more electronic message addresses associated with a group alias address from receiving an electronic message. A method of the invention comprises receiving exclusion criteria associated with the electronic message. The exclusion criteria identify a type of group member to be excluded from receiving the electronic message. The method further comprises identifying group members associated with the group alias address. The method further comprises processing the exclusion criteria to identify one or more excluded group members to exclude from receiving the electronic message and one or more included group members to receive the electronic message. The method further comprises blocking the excluded group members from receiving the electronic message.