1. A system for generating configurations used for a user accessing electronic mailboxes comprising: a storage medium including a database that stores configuration conventions as sets of configuration parameters comprising at least a mail host and a login name that are sets of e-mail expressions formed by symbols that symbolically represent the configuration conventions used by email providers for a set of configuration parameters used for accessing electronic mailboxes; and a transformer module that infers a mail domain from user supplied context data, and based on the inferred mail domain, retrieves relevant configuration conventions from the database and expands the configuration conventions retrieved from the database to generate sets of possible configuration parameters that can be tried for accessing an electronic mailbox of the user, wherein said transformer module is operative for using context data to expand a symbol into a corresponding value using context data and is operative for discovering new configuration conventions as context data is received and storing the new configuration conventions within the database.