Data flow: Receiving email on an 

iOS

 device using the 

BlackBerry Secure Gateway

The native email client on iOS maintains a permanent connection with the email server over an encrypted and authenticated channel between the 

BlackBerry Infrastructure

 and the 

BlackBerry Secure Gateway

 and detects changes in the folders configured for synchronization on the mail server.

When there are new or changed items for the device, such as a new email message or updated calendar entry, the mail server sends the updates to the device through the secure channel between the 

BlackBerry Secure Gateway

 and the 

BlackBerry Infrastructure

 to the email or organizer app on the device using the 

Exchange ActiveSync

 protocol.