Volume
About 390 billion emails a day. Where do they all go?
Roughly 48 for every person on Earth, every single day. A large share of them is machine-made.
Counting email is harder than it sounds. Providers don't publish their daily totals, and analysts estimate them from surveys and models. The best-known series is from the Radicati Group, which puts global email traffic in 2026 at about 392 billion messages sent and received a day.
The numbers, as a rough picture
- About 390 billion emails a day across the world (sent plus received, 2026 estimate).
- That is roughly 48 for every person on Earth, if you count every human equally.
- The growth is slow: about 4 percent a year since 2018, according to the same series.
Why the number is so big
- Every receipt, password reset, login code, shipping update and calendar invite is an email.
- Newsletters and marketing are a big share, and so is automated system mail.
- Spam is still a large share of traffic in most estimates, even after filtering.
What this means for a sender
- Your message is one of billions, so mailbox providers judge senders by behaviour, not by content alone.
- Sending little and sending well beats sending a lot to people who never asked.
Figures are estimates from market research. Different sources disagree by tens of percent, so use them for scale, not for accounting.