... personalize the subject line to thesubscriber's locale.7. Ask a question in the subject line. Subject lines f ramed as questions perf orm well.8. Keep is short. Write and rewrite your subject ... way you are going to grab my attention in my inbox is if your subject line is killerYour content might be great, but f rankly, I'll never know it unless your subject line is anything but ... that. But anyway, your subject lines don't actually suck. It's just that your subject linesdon't pop. They aren't killer. And again, without a killer subject line, no one is...