How Many Emails Are Sent Every Day

Fascinating email statistics

Business woman are sending email marketing by digital smart phone
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Statistics, extrapolations, and counting by the Radicati Group in February 2017 estimated the number of email accounts worldwide at 3.7 billion and projected that the number of emails sent per day in 2017 averaged a staggering 269 billion.

By contrast, the Radicati Group's estimate for 2015 was 205 billion emails per day and the estimate for 2009 was 247 billion emails sent per day.

Fascinating Email Statistics

DMR offers these other fascinating statistics on email, compiled in August 2015 and updated in 2017:

  • First email system: 1971
  • Average office worker receives 121 emails a day and sends out 40 business emails a day.
  • Eighty-six percent of professionals name email as their favorite mode of communication.
  • Sixty-six percent of email is read on mobile devices.
  • Percentage of email that is spam: 49.7 percent
  • Percentage of emails that have a malicious attachment: 2.3 percent
  • Top country where spam is generated: The United States, followed by China and Russia
  • Top country where spam is generated (per capita): Belarus
  • Open rate for email sent in North America: 34.1 percent
  • Mobile click-to-open for U.S. marketing email: 13.7 percent
  • Desktop click-to-open for U.S. marketing email: 18 percent
  • Average open for political emails: 22.8 percent
  • Length of subject line for highest read rate: 61 to 70 characters
  • Top day for email volume: Cyber Monday
  • Company that sends the most email per user: Groupon
  • Percentage of mobile users who read an email based on subject line: 33 percent
  • Most popular mobile device for email opens: iPhone
  • Percentage of users who made a purchase based upon an email received on their mobile device: 6.1 percent
  • Tuesday is the best day to send an email because more emails are opened on Tuesday than on any other day of the week.
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