You're off topic for this forum, which is dedicated to Windows Live OneCare.
If you changed your email address to another one, then you will need to notify your senders of you new address. If you no longer access the old Hotmail account, you won't get any emails sent to this address. If the old account is still active and your new account is also a Windows Live Hotmail account, you can set forwarding in the Hotmail options for the old account to forward to your new @Live or @Hotmail account, but you will need to access the account periodically or it will be closed as inactive.
-steve