#1: The Bold And Audacious Subject Line
#3: The Introspective Subject Line
#4: The Controversial Subject Line
#5: The “If-Then” Subject Line
#6: The “Remember The One Time…” Subject Line
#7: The “Note From A Friend” Subject Line
#8: The “Only Open If” Subject Line
#9: The Social Identity Subject Line
#10: The “Here’s Your Thing” Subject Line
#11: The Cliff-Hanger Subject Line