A mechanism is provided for controlling the content of an electronic message on an electronic messaging system including a plurality of communities that facilitates the tailoring of the content of a posted electronic message to the interests and/or access privileges of such communities. An electronic lexicon is provided for each community, the lexicon defining content relevant to the community. The electronic message is interpreted for disclosure to a particular community to identify content in the message relating to content in the electronic lexicon of the particular community. The electronic message is redacted based on the identified related content if the electronic message contains content in a form unsuitable for the disclosure.