The most successful strategy for email marketing will vary depending on the specific business, its products or services, and its target customer base. However, some strategies tend to be more effective than others.

Personalized email campaigns that are targeted to specific segments of the customer base tend to be highly successful, as they are more relevant to the recipient and can increase the chances of them taking action.

Email automation strategies, such as abandoned cart emails, can also be highly effective in increasing revenue by reminding customers of items they left in their online shopping carts.

Creating a loyalty program that rewards customers for repeat purchases and engagement with the business through email is a great way to encourage repeat business.

Incorporating email into your cross-selling and upselling strategy can be successful, as it allows you to send personalized product or service recommendations to customers based on their purchase history, browsing behavior or other data.

Incorporating call-to-action (CTA) buttons in emails is also crucial, as it makes it easy for customers to make a purchase or sign up for a service, thus increasing the chances of conversion.

Ultimately, a combination of several of the strategies above, along with A/B testing and continuous optimization, can help to achieve the best results for your business.