It seems RC have a problem with Hotmail. I've just got this after i tested they were working (my RC inbox is suspiciously quiet):
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients failed.
steff@stygianfox.com
info@stygianfox.com
Anyone got any ideas? It seems like RC is having a few issues lately. As I use it for my freelance business i can't afford to have clients think im not able to be contacted.