Also, one in 10 workers now has more than 10,000 mails in their inbox. Nearly 85 percent of those surveyed spend 30 minutes or more every day organizing their mail — over one and one half weeks of work every year.
The study revealed three different styles of email management: filers, who empty their inbox on a daily basis and file messages into folders; hoarders, who never delete, but tag and keep in just a few folders; and a combination. There also is a small niche that admits to completely giving up on maintaining control over their email.
Here's more about email usage based on Varonis' survey: