Adapter Polling and Listener Notifications vs. the Outbound Message Notification from Salesforce.com

This section lists the differences between the adapter notifications and the outbound message notification feature of Salesforce.com.

Functionality	Adapter Notification	Outbound Message Notification from Salesforce.com
Immediate notification	Available through listener notifications	Available
Security	Available	Available only if you are using an Enterprise Gateway Server.
Access to past data changes	Available	Not available
Bulk data retrieval	Available	Not available
Conditional notification	Not available	Available