The United States ranked first in the world for sending the most spam emails in a single day as of January 16, 2023, with about eight billion. Czechia and the Netherlands followed closely with 7.7 billion and 7.6 billion spam emails, respectively.

Global trends in internet and email usage The number of email users worldwide grew from 3.9 billion in 2019 to 4.1 billion in 2021 and is projected to reach 4.6 billion by 2025. However, email usage varies across countries. For instance, China and India had the largest internet populations as of July 2021, with over 979 million and 845 million users each, but they used email less frequently than users in the United States or Germany.

Email as the top online activity in the U.S. Email was not only the most common source of spam messages globally as of October 2021, but also the most popular online activity among U.S. internet users in 2019. In fact , email users accounted for 90.9 percent of respondents, surpassing search users, social network users, or digital video viewers.

Data by Cisco Talos