281 billion. That’s the total number of business and consumer emails sent and received per day in 2018, according to The Radicati Group. That’s nearly 200,000 emails a minute -- and over 3,000 emails per second. What’s more, that number is forecasted to grow to over 333 billion per day by the end of 2022. As a marketer you’re probably thinking a few things at this point: 1) How am I ever going to achieve inbox zero?

2) How am I going to make sure our business emails stand a chance in our recipients’ inboxes with all that competition taking up space? Well, let us start by offering you a bit of good news to take the edge off: According to a report from HubSpot Research, 46% of consumers still want to see email content from brands or businesses they support.

Despite all that clutter, you’ve still got a shot at earning people’s attention -- but it’s not going to come easy. And perhaps more than ever before, your subject line has got to shine. To help you get a sense of exactly what that means in today’s modern and messy inbox, we’ve pulled together 100 email subject lines that we couldn’t help but click.