“’Orange Club Biscuits’. This was a more grabby subject line in response to last week’s column than the typically inscrutable ‘today’s article’, which gives no clue as to whether the email contains a bouquet, a hand grenade or something neutral.”

What is the most off-putting thing you can write in the subject line of an email? It’s not “Please help me” or “You’ve won”. It’s not even “erectile d(...)