Email Marketing is a very powerful way to persuade old customers to come back and find new customers. There are some things you should consider, though you find it interesting.
The first step in an effective marketing campaign is to reach the goal. There is no point in sending a brochure with proposals on building materials that can only buy IT tools such as simply ignoring the email.
If you know what your customers want, you can easily approach them in an interesting way. Forget formalities and sweet conversations, such as "dear buyers" or other general addressing methods; rather use the name of the client to provide each e-mail with personal sensibility. This will be more friendly with the customer and also feel that the email has been specifically written to him, not as part of a marketing campaign.
Another powerful way to be surprised by customers is to send them fully customized emails regularly. To do this, each customer's purchase history and custom promotion are required for each of them. This shows them not only looking for sales but really caring about them and doing all they can to improve their services and bids.
You also need to consider sending an informational email at a time without directly referring to your products or promotions. Go to some informative, relevant work area, such as a famous expert, an interesting case study, or anything else you think.
One of the great ways to keep your customers interested is to create competitions. It is known that people love racing, even if the prize money is not so good, so use these benefits. Create quizzes and balls, everything that can convince your clients to enter the competition. You can also consider making a significant prize from time to time, motivating them even more. Even in the absence of big winnings, customers will continue to join the game for the sake of your race and you will still win.
This is the simplest and most effective way to make email marketing more interesting and it is up to you how satisfied you will be with your customers' happiness.