A messaging system that organizes and presents messages to users of the messaging system. The messaging system includes a mailbox module that receives messages and generates conversation threads from the messages. Messages received from different electronic message channels may be aggregated into a common conversation thread. The conversation threads are also organized in a message interface and then presented to a user of the messaging system. The messaging system may include a social networking system that stores social information about users, which can be used to organize the conversation threads. Other features include a multi mode message interface, and a method for adding contextual information to messages.