BLACKBERRY INTERNET SERVICE (BIS)
This is ideal for smaller businesses and busy individuals.
BlackBerry Internet Service is a component of the BlackBerry Internet Solution, which allows you to integrate your BlackBerry device with up to 10 supported business or personal email accounts, send and receive instant messages, and browse web content while on the go.
You get “push” delivery of messages, mobile access to email attachments and images in popular formats, as well as convenient access to HTML and WAP pages.
BIS allows BlackBerry users to access web-based POP3, IMAP and Outlook Web Access (OWA) email accounts without connecting through a BlackBerry Enterprise Server (BES)