The invention proposes a method for delivering messages in a network comprising at least one terminal device, comprising the steps of generating a message (S1), setting a condition for receiving the message (S2, S3), deciding whether the message is to be received by the terminal device on the basis of the condition (S5, S6), and trans-mitting the message to the terminal device on the basis of the result of the deciding step (S8). By this method, messages are only transmitted to a terminal device if certain condition, e.g., location conditions, are met. The invention also proposes a network system and a message generating device, a message delivering device and a terminal device adapted to the above method.