During a 2020 survey carried out among marketers worldwide, it was found that for every U.S. dollars invested in email marketing, brands earned ** U.S. dollars. Among the presented industries, the ROI was highest in the retail, ecommerce, and consumer goods sector, with ** dollars per one dollar spent.

During a 2021 survey carried out among marketers from the United Kingdom, it was found that the approximate return for every pound spent on email marketing stood at ***** British pounds. A year earlier, it amounted to ***** pounds.

As of April 18, 2024, the United States was the country with the highest number of emails sent daily, with almost ten billion. Germany and Ireland followed, with 8.5 billion and 8.4 billion emails daily, respectively. Overall, the Netherlands, the United Kingdom, and France each had 8.3 billion emails sent per day. As of December 2023, over 241 million emails were sent worldwide within one minute.