Long ago (september 07), I got my .mac account all setup and running. I added that email to the .Net Passport no problem and use Microsoft's Mac Messenger. Just recently I've been getting my problem. Out of about 130 contacts that I have added. Not "one" of them can send me a message... I'm signed in, they can open a window, but after sending a message to me they get this error: "The following could not be delivered to all recipients" And yet, if I send them a message. For about 5 minutes they can successfully reply. Now I've tried using other computers running XP or Vista and other Macs. Same difference. I have no firewall enabled. Running 10.5.2 Anyone? Anything? Im so fed up with Microsoft's tech support.