Windows Live Hotmail - problems?

I use Hotmail even before it was bought by Microsoft. And I'm very satisfied with it.
Now I can use it in Firefox and Safari with almost the same characteristics as from Internet Explorer and we have more storage space to enjoy.
But today I had a unique problem that I hope will be solved fast:

"Windows Live Hotmail couldn't send your message because the server was busy. Please try again later".
I'm posting this message with the hope that some guy from Microsoft would check it... and take it to the right hands. I think it is a critical problem to solve.