Abstract: A method, performed at a server system, includes accessing an electronic message having a message body and received at an account of a respective user. Typically, prior to a first time the respective user views the message body, the electronic message is moved from a first folder of the account of the respective user to a second folder. If the electronic message satisfies predefined criteria, the method includes: generating a modified electronic message that includes the received electronic message and supplemental information related to one or more characteristics of the received electronic message; and storing the modified electronic message in the first folder of the account of the respective user. The modified electronic message is provided to the respective user, at a respective client system, in response to a request for the electronic message.

Abstract: A method, performed at a server system, includes accessing an electronic message having a message body and received at an account of a respective user. Typically, prior to a first time the respective user views the message body, the electronic message is moved from a first folder of the account of the respective user to a second folder. If the message body includes tracking content, the method includes: generating a modified electronic message having a message body that does not include the tracking content; and storing the modified electronic message in the first folder of the account of the respective user. The modified electronic message that does not include the tracking content is provided to the respective user, at a respective client system, in response to a request for the electronic message, wherein the server system is distinct from the respective client system.