If you want to prevent Syncro from sending emails to a specific Customer (including all Contacts belonging to that Customer), you can. Follow these steps:

1. Navigate to the Customers tab/module.
2. Click the Customer's name to open their Details Page.
3. In the upper right, click Edit.
4. Check the “No Email - Of Any Kind” box.
5. Click Save Changes.

Notes: 

• Syncro doesn't warn you when you try emailing a Customer (e.g., via a Ticket Communication) with this setting enabled. Your Customer will simply not receive the email.
• If you discover that the “No Email - Of Any Kind” box is becoming checked automatically, it’s usually for one of the following reasons:
  • Our email partner, Sendgrid, wasn’t able to successfully deliver the email to the intended recipient. When an email bounces like this, the “No Email” box is checked automatically to prevent future bounces. To start sending email to this customer again, change the email on file in Syncro to a valid email address, uncheck the “No Email” box, and save your changes. If you continue to experience issues, consider the Syncro Email Options for Maximizing Deliverability (specifically, SMTP) or contact Support for further assistance.
  • A customer has disabled all communications from within the privacy settings of their Portal: 
    
    To start sending emails to this customer again, uncheck the “No Email” box and save your changes.