If you are not receiving messages for 'Status Change Notifications', please check your spam folder. If the message(s) appear here, you will want to mark them as 'Not Spam'/'Friendly'. This will prevent future messages from being sent to spam.
Also, you may need to have your shop and/or customer add the following emails and IP address to their whitelist/accepted list so that the email client's spam filter doesn't block Printavo messages. Here is an article explaining that as well as a few articles showing how to do that for Gmail and Outlook: