For all the Marketing emails if the flag 'Add unsubscribe link to the email?' is not checked, then it would be treated as a Transactional email in our system and will be sent out through the Transactional Subuser account in SendGrid.
For all the Marketing emails if the flag 'Add unsubscribe link to the email?' is not checked, then it would be treated as a Transactional email in our system and will be sent out through the Transactional Subuser account in SendGrid.