Between October 2020 and September 2021, global daily spam volume reached its highest point in July 2021, with almost 283 billion spam emails from a total of 336.41 billion sent emails. As of August 2021, this number dropped to 65.50 billion. Towards September the average spam volume again saw an increase of 36 percent, reaching 88.88 billion from the total of 105.67 billion emails sent worldwide. The country, where the most emails were sent, was the U.S..
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Cisco Talos Intelligence Group. (September 1, 2021). Average daily spam volume worldwide from October 2020 to September 2021 (in billions) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 20, 2026, from /statistics/1270424/daily-spam-volume-global/
Cisco Talos Intelligence Group. "Average daily spam volume worldwide from October 2020 to September 2021 (in billions)." Chart. September 1, 2021. ÌÇÐÄÆƽâ°æ. Accessed July 20, 2026. /statistics/1270424/daily-spam-volume-global/
Cisco Talos Intelligence Group. (2021). Average daily spam volume worldwide from October 2020 to September 2021 (in billions). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 20, 2026. /statistics/1270424/daily-spam-volume-global/
Cisco Talos Intelligence Group. "Average Daily Spam Volume Worldwide from October 2020 to September 2021 (in Billions)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 1 Sep 2021, /statistics/1270424/daily-spam-volume-global/
Cisco Talos Intelligence Group, Average daily spam volume worldwide from October 2020 to September 2021 (in billions) ÌÇÐÄÆƽâ°æ, /statistics/1270424/daily-spam-volume-global/ (last visited July 20, 2026)
Average daily spam volume worldwide from October 2020 to September 2021 (in billions) [Graph], Cisco Talos Intelligence Group, September 1, 2021. [Online]. Available: /statistics/1270424/daily-spam-volume-global/
