Agreed—this should not be taken to the extreme. Being overly courteous would likely result in no marketing or sales emails, which is not the goal. These considerations should be taken into account after you’ve determined you have a message you want to share. While you may be hitting goals and not receiving negative feedback with frequent or less relevant emails, we should be striving for positive feedback. The majority of buying experiences are based on how the customer feels they are being treated, and most new business (~65%) comes from client referrals. We want to empower our email recipients to be brand advocates.