Test. Different email clients and mobile devices display emails differently. Send test emails to colleagues, or use a testing program to make sure your emails are going to look good on screens big and small. Testing reveals design mistakes before it's too late, and testing programs can predict whether or not a campaign will get caught in a spam filter. You could even set up accounts with a few different email services for easy testing. Avoid sending one big image as a campaign, and cover your bases with a plain-text option for every email.

Take personalization emails a step farther, and you can customize your call to action (CTA). Focus on understanding buyers and how their roles fit within their organizations. For example, a marketing director and a technical director may have entirely different goals and perspectives when they open up your email. If you offer a unique CTA for the two groups, they are more likely to engage with your email and more likely to convert.
Don’t talk down to people. I think this should be obvious. But looking at the email offers I get, clearly it isn’t. Don’t tell people, “Not buying this product would be idiotic!” or “Only a fool doesn’t understand the value in this service.” This whole email marketing strategy relies on you making people understand the value they can get from you. And sometimes that means making people see the downsides of not buying. But you can do that in a friendly, respectful way.
S • Segment. Market research and data analysis heavily inform this first step. You can also use marketing personas and the like to help. Your primary aim with this step is to identify differing customer needs according to relevant markers (e.g. demographic, behaviour, occupation, interests...). You then divide your market into ‘segments’ according to these needs.
Personas provide a multi-dimensional method of targeting. They’re based, as the name suggests, on a projected persona for each customer ‘type’. Get it right, and personas can help you enormously in both predicting behaviour and personalising your communications. Personas are a powerful technique, and they’re increasingly used to improve the usability and customer centricity of communications.