You folks using Hotmail and getting messages in your junk mail should follow these instructions and post the copied text here.
http://www.haltabuse.org/help/headers/hotmail.shtml
This should contain information that will let the admins see how the message is getting routed. It could be a reverse DNS issue that could be fixed with a simple MX record update.
For those of you using Outlook, simple click on the file tab and press the "Properties" button.
Then copy and paste ALL the text from the circled area in a post on this thread.