The present invention is directed to a method and system for composing a package of application files to be sent as e-mail attachments in e-mail communications. A plurality of data structures are created, wherein each data structure groups together a plurality of different user application files designated as attachments to an e-mail communication. Application files designated from within user applications are associated with selected data structures, such that each designated application file is associated with a selected data structure. During composition of an e-mail communication having attachments, a list of the data structures containing application files are provided.