Method and server for providing response message to message transmission request

A method of providing a response message in response to a message transmission request, the method comprising:

• receiving, by a telecommunications company server, from a transmission terminal, an outgoing call request for transmitting a plurality of voice messages to a reception terminal;
• determining, by the telecommunications company server, whether a receiver account corresponding to the reception terminal is subscribed to an overseas notification service upon receiving the outgoing call request;
• routing, by the telecommunications company server, a line connection between the reception terminal and the transmission terminal to pass through a service server when the receiver account is subscribed to the overseas notification service;
• providing, by the service server, a first response message corresponding to a first voice message, which is any one of the plurality of voice messages, to the transmission terminal;
• and
• providing, by the service server, a second response message corresponding to a second voice message, which is any one of the plurality of voice messages, to the reception terminal.