Is it possible to send out a newsletter email to all of my customers?

Yes, you can send emails to all of your customers by setting up a Workflow rule and associating an email alert.

Step 1: Create a Custom Field

Create a Checkbox type custom field at the customer level. This will be the trigger to send the emails.

Step 2: Set up the Email Alert

• Navigate to Settings at the top-right corner of the page.
• Click Workflow Actions under the Automation section.
• From the Email Alerts tab, click +New Email Alert.
• Enter a Name for the email alert, and for the Module field, choose Customers.
• Click the Email Template field and customize a new template by clicking on + Add New Email Template option.
• Choose the respective recipients from the Email Recipients field, add CC/ BCC (if any ).
• Click Save.

Step 3: Set up the Workflow rule

• Navigate to Settings at the top-right corner of the page.
• Select Workflow Rules under Automation.
• Enter a Name and select the Module as Customers.
• Choose when you want to trigger the notification as Event Based with the Edited option and set the condition as When any selected field is updated.
• Choose the checkbox type custom field from the list of fields.
• Set up filters and criteria for the workflow as per your requirement and click Next.
• Select the Action Type as Email Alerts.
• Select the customized email alert from the list.
• Click Save.

Now, whenever you wish to send emails to your customers, you can bulk update the CheckBox custom field by checking / unchecking it. Any changes to the field will trigger the workflow rule.