Embodiments related to a message processing system are disclosed herein. In some embodiments, a computing system may include receiver logic to receive a message addressed to a user; analysis logic to determine whether a message collection, including the received message, has a common theme (e.g., a common sender or common content); modality logic to identify a messaging modality associated with each of the messages in the message collection; criteria logic to determine whether the message collection satisfies modality criteria (e.g., the messages represent at least two different messaging modalities); and notification logic to provide a notification of the message collection in response to determining that the message collection has a common theme and satisfies the modality criteria. Other embodiments may be disclosed and/or claimed.