Are Your Zaui Emails Transactional?
The answer should be yes. Emails via Zaui are confirming a transaction has taken place. They indicate a service has been paid for and provide the details of the service.
Perhaps they follow up to ensure that the service provided met or exceeded the purchasers' expectations at the time of the transaction.
Are Your Zaui Emails Marketing Emails?
The answer should be no. The emails in Zaui are, by design, transactional. As such, there is no way for guests to unsubscribe from receiving them (as one would have with marketing emails).
If a customer receives a marketing email they do not want (with no option to unsubscribe) they will likely flag it as spam. If this occurs repeatedly it can cause Zaui emails to be blacklisted, and this affects companies beyond those sending marketing emails through Zaui.