One or more embodiments of the disclosure provide a context-aware communication system for efficiently providing a sender of an electronic communication message with the communication context of a recipient. The communication context provides the sender with one or more indications regarding the activity, situation, or environment of the recipient user, which enables the sender to informatively decide whether to send an electronic communication message to the recipient. As disclosed herein, the context-aware communication system determines a recipient's communication context based on behavior characteristics of the recipient.