Chapter 8 Reference 3
How Many Emails Are Sent Per Day in 2021?
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How Many Emails Are Sent Per Day? (2026) | Review42
392.5 billion emails are sent per day in 2026. Explore verified stats on email volume, users, spam, ROI, open rates, and the best time to send email.
From the page's own metadata at review42.com, 2026-08-30.
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