Abstract: In a system for registering E-mail addresses for subscribers of the system, a telephone call manager, upon request, provides a subscriber with a unique identifier and stores a copy of the unique identifier. An E-mail manager receives and processes an E-mail message sent to a first E-mail address, the received E-mail message including a request to register a second E-mail address, the received E-mail message including the unique identifier. The E-mail manager, upon receipt of the E-mail message, compares the unique identifier with the copy of the unique identifier stored by the telephone call manager, and registers the second E-mail address only if the unique identifier and the copy of the unique identifier correspond. In a second embodiment, an E-mail message requesting registration of the second E-mail address is first sent to the E-mail manager.

Abstract: An enhanced telephone service system including a subscriber service manager and a customization module. The subscriber service manager is configured to receive subscriber transaction-ID requests, supply transaction identifiers and respond to queries for subscriber profile data. The customization module is configured to receive customization messages. When a customization message includes a transaction identifier, the customization module compares the transaction identifier in the customization message with the transaction identifiers generated by the subscriber service manager. Only if there is a match between the transaction identifiers does the customization module register the customization data. Alternatively, if the customization message does not contain a transaction identifier but does contain a subscriber identifier, the customization module temporarily stores the customization data.