1. A method for storing electronic messages in a multi-tenant database system, the method comprising: receiving, at one or more computer systems associated with the multi-tenant database system, an email; determining, with one or more processors associated with the one or more computer systems, a first portion of the email, the first portion designated to be stored in a database associated with at least one tenant in the multi-tenant database system; determining, with one or more processors associated with the one or more computer systems, a second portion of the email, the second portion designated not to be stored in the database; and storing, with the one or more processors associated with the one or more computer systems, the first portion in the database with a reference to the second portion as stored in a storage device different from the database.