How Many Emails Are Sent Every Day

And Other Fascinating Email Statistics

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How Many Emails Are Sent Every Day

Statistics, extrapolations and counting by the Radicati Group from February 2017 estimate the number of email users worldwide was 3.7 billion, and the amount of emails sent per day (in 2017) to be around 269 billion.

205 billion email messages per day means almost 2.4 million emails are sent every second and some 74 trillion emails are sent per year. 

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

Fascinating Email Statistics

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

  • First email system: 1971
  • Average office worker receives 121 emails a day
  • Percentage of email that is spam: 49.7%
  • Percentage of emails that have a malicious attachment: 2.3%
  • Top country where spam is generated: United States
  • Top country where spam is generated (per capita): Belarus
  • Open rate for email sent in N.Am: 30.6%
  • Mobile click-to-open for US marketing email: 13.7%
  • Desktop click-to-open for US marketing email: 18%
  • Average open for political emails: 22.8
  • Length of subject line for highest read rate: 61 - 70 characters
  • Top day for email volume: Cyber Monday
  • Company that sent the most per user: Groupon
  • Percentage of mobile users who read an email based on subject line: 33%
  • Percentage of opened emails that are opened on a desktop: 55.2%
  • Percentage of opened emails that are opened on a smartphone: 25%
  • Percentage of opened emails that are opened on a tablet: 7.3%
  • Most popular mobile device for email opens:  iPhone (with 33%)
  • Percentage of users who made a purchase based upon an email received on their mobile device: 6.1%
  • Most effective day of the week to send an email (based on open rates): Saturday
  • Least effective day of the week to send an email (based on open rates): Friday
  • Least effective day of the week to send an email (based on click rates): Wednesday / Friday