This article explains how mail is routed between an IBM Lotus Domino server and a BlackBerry handheld device using BlackBerry Enterprise Server. Also included are a detailed description and diagrams of the architecture behind the routing process...

Source: http://www-10.lotus.com/ldd/dominowiki.nsf/page.xsp?documentId=48F12BA1221285CE852575820071A2AB&action=openDocument&SessionID=CF4P3Y9Q3X