Tom, it seems that you are not the only one to see this problem. When I googled it up, there were others asking about it, but no obvious solution.
If you are sending e-mails *from* starband.net *to* a Windows Live Hotmail account and those e-mails are rejected, then it may be that Hotmail has banned the entire starband.net domain. That could be because Hotmail has received too much spam from there or for some other perceived transgression. I suggest that you contact support at starband.net and at Hotmail and hopefully they can straighten it out for you.