Sometimes you may not want to send automatic/automated emails to a particular customer. You can unsubscribe a customer from these emails at any-time and re-subscribe them later.
From the customer profile page, or when editing a customer
Navigate to a customer account/profile.
Click the Edit button in the left side information panel
Click on the settings section to expand it.
Scroll down until you see the 'Opt-in to receive transaction email.' section.
Check or un-check the box to opt the customer in, or out.
Click the save button (bottom right side).
If you unsubscribe a customer from transaction email you will need to manually:
Send estimates
Send Invoices
Send payment receipts
Send form auto-res-ponders
Send follow-up emails for jobs, estimates and invoices
Send order confirmation emails
Send survey requests