Customer Doesn't Receive Marketing Email
If a customer is not receiving marketing emails, first check to see if they have a valid email address in their customer profile.
Customers can opt out of email marketing. You'll find this in the customer profile on the Options tab--see below.
Opting out of email marketing does not affect notifications for appointments.
NOTE: Opting out is different from marking an email as Spam. If a customer is not opted out and not receiving marketing or notifications emails, they should check their spam folders.