An Admin can change the Email Preferences for a constituent's record to opt them out of receiving emails.
  1. Navigate to Constituent360 > Constituents
  2. Enter the constituent name
  3. Click Find
  4. Under the Actions column, click View
  5. Select the Email Preferences tab
  6. Click the Edit Site-Wide Preferences button
  7. Mark the radio button for "No, opt this constituent out of site-wide email"
  8. Click Save