About the BlackBerry Internet Service
The BlackBerry® Internet Service is an email and internet service for BlackBerry smartphones that is designed to provide you with automatic delivery of email messages, and wireless access to email message attachments and internet content.
Depending on your messaging service plan and your BlackBerry® Management Center permission settings, you and your BlackBerry Management Center administrator can add up to ten existing email accounts to your smartphone. The BlackBerry Internet Service is designed to retrieve email messages from email accounts that have been added, deliver email messages to your smartphone, and provide wireless email reconciliation for supported email accounts. With some types of email accounts you can synchronize contacts and calendar entries between your email account and your smartphone.
The BlackBerry Internet Service also allows you or your administrator to set up a BlackBerry email address that you can use to send and receive email messages on your smartphone.