The invention of email made it easier to stay in contact with friends and loved ones. It also made it easier for companies to send you spam to clog up your inbox.

Google
    Here are the top ten offenders and the average amount of emails they send each year:

  1. Groupon. 388 per year. That's more than one a day.
  2. LivingSocial. 363 emails per year.
  3. Facebook. 310 emails per years.
  4. Meetup.com. 199 emails per year.
  5. J. Crew. 175 emails per year.
  6. Twitter. 173 emails per year.
  7. Victoria's Secret. 160 emails per year.
  8. LinkedIn. 157 emails per year.
  9. Gilt.com. 155 emails per year.
  10. Kohl's. 154 emails per year.

The study from Business Insider also looked at which emails people unsubscribed from the most.