A processor may receive a delivered message. The processor, using natural language processing, may identify content of the delivered message. The processor may generate a first importance score for the delivered message based on the content of the delivered message. The processor may send a notification to at least one recipient of the delivered message as a reminder of the delivered message, in response to the first importance score fulfilling a predefined delivery condition. In some embodiments, a processor may receive a message. The processor may identify the content of the message using natural language processing. The processor may generate a first importance score for the message based on the content of the message. The processor may determine that a second message received is related to the message. The processor may update the first importance score.