A message treatment process executed by a user's terminal when a message is being drafted is disclosed. The terminal has access to a corpus of messages containing at least one message sent by that user to at least one recipient user. In one aspect, at least one part of the message drafted by the user is retrieved. Concerning at least one message in the corpus, a semantic similarity score is calculated with a view to match at least part of the draft message with one message at least in the predetermined corpus of messages. At least one message is selected in the corpus of messages, based on the semantic similarity score calculated for a least one message in the corpus, then at least part of a previously received reply to at least one selected message is replicated.