Litmus recommends around 50 characters. Yes Lifecycle Marketing says emails with subject line up to 20 characters have ethe highest average open rate, unique click rate, and click-to-open rate. An analysis from Retention Science found that subject lines with 6 to 10 words results in the highest open rates. And Return Path advises using 61 to 70 characters.

It can be frightening to think about, right? But that is exactly how I think email lists should be treated. When you think about it this way, you can begin treating your email list more like people in a room who are there waiting to hear what you have to say and, ultimately, continually deciding if you and the information you provide is still worth being in the room for. This approach will help you craft effective emails, build trust, and remember to treat your list with respect.

Using the Personalize dropdown, you can insert custom snippets like your subscribers first name, or sign up date, and AWeber will automatically insert that data specific to each subscriber if we have it. If you collect first name, for example, you can send an email that says Hello Tom, or Hello Mary, or Hello John, depending upon who you’re sending to.
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