"Get in their head" Perfect advise. And if that's not possible: Ask someone in your target audience to give you feedback. You don't need A/B tests, fancy mark

"Get in their head" Perfect advise. And if that's not possible: Ask someone in your target audience to give you feedback. You don't need A/B tests, fancy markup or the newest marketing patterns if the gist of your message is misunderstood. Ideally, the gist of the message should be in the subject line.