Wow, I'm at a loss here -- I posted this exact same question a while back and it's doing the exact same thing: my Send Connector I've created for "Microsoft Domains" (hotmail.com cost 1) is being ignored again and routed through the "Default" Send Connector (* cost 10). Last time, I had the same cost for both Send Connectors, but I've tried setting the Default connector to 5, 10, 100, etc. and regardless, all mail gets routed through that connector (which smarthosts through Postini). Besides calling an air strike on Redmond, what else can I do? MS is blocking Postini again, need to get this working permanently.