A system and method for enabling users to send and receive messages and other information from mobile devices and enabling users to access server-based information using mobile devices over wireless data networks are disclosed. The present invention enables users to customize information that is received and sent from mobile devices. For example, the user may select to receive emails (or other correspondences) from a particular individual or group of individuals. The user may also select to receive a particular type of types of emails (or other correspondences), such as the ones marked as high priority or otherwise designated as being important. Other variations may also be implemented. In addition, the user may customize responses, replies and other outgoing information from the user's mobile device. Mobile device users may also customize various aspects of views and applications. Examples of customizable options may include home page (e.g., personal, any URL), time zone, date format, font format, language and other options.