You can write the best email in the world and it will not matter if nobody opens it. The subject line is the front door, and most of us rush it.
Keep it short and specific
Aim for under fifty characters. Say what is inside, name the benefit and avoid vague teasers. Specific beats clever almost every time.

Test two versions
Send two subject lines to a small slice of your list, then send the winner to everyone else. Over a few months the gains add up quickly.

Next week in Part 4 we look at preview text and the first line of your email.

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