A method for associating related electronic messages in computer storage. A first transportable application is created and stored. User input requesting creation of a link from the first transportable application to another transportable application is received. User input that selects a second transportable application from among a plurality of previously created transportable applications is received. A link from the first transportable application to the second transportable application is created and stored. As a result, transportable application may be inter-related in complex message webs. The message webs may also be inter-related in message web rings. Links may be generated manually or automatically, based on context, workflow processes, or other known relationships among applications. Recipient lists and data may propagate among fields of linked transportable applications, directly or according to abstract business rules. Further, multiple-part electronic messages are disclosed. A graphical user interface of an electronic messaging system displays a message in the form of one or more header portions and one or more body portions. Each of the body portions has a selection region. While one body portion is visible at a given time, all the selection regions are continuously visible in the user interface to facilitate selection of any of the body portions at a particular time. Selecting a selection region of a non-displayed body portion causes a server to generate a refreshed user interface that includes the entirety of the selected body portion, and that hides the previously viewed body portion. As a result, a large amount of associated information may be combined in a single message in a way that is clearly organized and easily accessible.