A message distribution apparatus and method for distribution of a message submitted by a user by a terminal connected to a communication network to a previously unknown group of receiving users has an access to a database which stores a semantic network data model with terms linked to each other by semantic relations and/or a social network data model with users linked to each other by social relations; a mapping engine which maps at least one term being associated with the submitted message to terms being associated with users of the social network data model and/or with terms of the semantic data model for generating a group of potential receiving users for the submitted message; and a distribution engine which distributes the submitted message of the submitting user via the communication network to a group of receiving users filtered from the at least one generated group of potential receiving users.