If the email asked for changes, then you should be able to respond to the email once the updates are made. If the email said you were rejected for various reasons and need to reapply, then you would have to reapply.
If the email asked for changes, then you should be able to respond to the email once the updates are made. If the email said you were rejected for various reasons and need to reapply, then you would have to reapply.