Currently, we don't have any spam detection capabilities, however, we do have best practices that can help lessen the chances of your emails going to spam. Please check out this resource.
We also recommend to run some test emails from time to time simply by adding your email(personal or other business), or your colleague's email into a test campaign. If it lands on inbox, you should be good. However, if it lands on spam, please contact the support team and we'd be happy to further investigate.