Information delivery system, delivery destination control method and delivery destination control program

A delivery destination control method for delivering a message through a telecommunications carrier, which is information delivered from a service provider to a user, comprising:

• storing ID federation information being information associating a user identifier for identifying a user in a service provider and a user identifier for identifying the user in a telecommunications carrier which the user subscribes to;
• receiving, from a service providing system administered by a service provider, contents of a message and a user identifier in the service provider as information indicating a user to serve as a delivery target of the message;
• determining which telecommunications carriers the user designated as a delivery target of the message subscribes to based on ID federation information stored in the ID federation information storage unit, and determining a telecommunications carrier to serve as a delivery request destination of the message to the user from the telecommunications carriers determined that the user subscribes to according to a predetermined condition;
• and
• transmitting the contents of the received message and a user identifier in the telecommunications carrier of the user for which delivery request destination is the telecommunications carrier as information indicating a user to serve as a delivery target of the message to a delivery system of the telecommunications carrier determined as a delivery request destination.

A computer-readable medium storing a delivery destination control program for delivering a message through a telecommunications carrier which is information delivered from a service provider to a user, the program running a computer to execute:

• processing of receiving, from a service providing system administered by a service provider, contents of a message and a user identifier in the service provider as information indicating a user to serve as a delivery target of the message;
• processing of determining which telecommunications carriers the user designated as a delivery target of the message subscribes to based on ID federation information being information associating a user identifier for identifying a user in a service provider and a user identifier for identifying the user in a telecommunications carrier which the user subscribes to, and determining a telecommunications carrier to serve as a delivery request destination of the message to the user from the telecommunications carriers determined that the user subscribes to according to a predetermined condition;
• and
• processing of transmitting the contents of the received message and a user identifier in the telecommunications carrier of the user for which delivery request destination is the telecommunications carrier as information indicating a user to serve as a delivery target of the message to a delivery system of the telecommunications carrier determined as a delivery request destination.