Managing Messaging Subscriptions in a Messaging System

A messaging system for managing messaging subscriptions. A messaging provider receives a request to subscribe a user's message account to a subscription system. The messaging provider associates the subscription system with the user's message account to indicate to the messaging provider that the user has subscribed to receive messages from the subscription system. The messaging provider also communicates an identifier for the message account to the subscription system, which is used by the subscription system in sending messages to the user's message account. By subscribing to receive messages from subscription systems via the messaging provider in this manner, the messaging provider is automatically notified of the subscription systems that a user has subscribed to, enabling the messaging provider to more accurately determine how incoming messages should be handled.