Note: While setup instructions are provided below, Gmail IMAP1 access is not officially supported for BlackBerry devices at this time.
To set up the BlackBerry's email client with SSE Riga email, just follow these steps:
If setup is successful, you should receive a confirmation message and a new mailbox icon should appear on your device's home screen, labeled with your Google Apps email address.
If you encounter a problem during setup, please make sure you have enabled IMAP in your main Google Apps Mail settings.
For more information about Gmail on Blackberry phones visit the official Blackberry website.