It's alarmingly easy to let your inbox can spiral out of control. So easy, in fact, that this graphic has been making the rounds all over Twitter this weekend:

There are 2 kinds of people in this world. pic.twitter.com/y8bUyrGHeo — Eli (@EliLanger) March 1, 2015

Eli Langer, who runs social media at CNBC, posted the tweet on Sunday, and within two hours it already had amassed hundreds of retweets. The image sparked a massive thread over email inboxes on Twitter — some people argue that having so many unread messages simply means you get a ton of spam. Others, however, think you need to use a better email client if your inbox is that full.

Business Insider's Alyson Shontell used to be in the class of people who let their inbox overflow with thousands of emails. Now, she's managed to change her habits and maintain inbox zero for months.