<A target="_blank" href="http://www.idonotes.com/IdoNotes/IdoNotes.nsf/dx/ibm-shutters-the-notes-net-routing-permanently.htm">Chris Miller says April 18, 2011 is the official end-of-life for @Notes Net mail routing</A>. If you still have contacts in your address book listed with @Notes Net domains, you can try the new domain, but not all the kinks are worked out.