An electronic device, such as a hand-held portable computer, is provided with client-side email capability that allows emails to be independently downloaded from a server, regardless of an operating mode of an email application and without using the standard email retrieval mechanism of the email application....http://www.google.com.tw/patents/US7290034?utm_source=gb-gplus-share專利 US7290034 - Method and system for polling a server for new emails, downloading the new emails in a background process, and caching the downloaded emails for access by an email application of an electronic device, such as a portable computer
