On the “best” side, you’ll notice the subject lines are pretty straightforward. They’re not very “salesy” or “pushy” at all. Heck, some people might even say they’re “boring.” On the “worst” side however, notice how the subject lines read like headlines from advertisements you’d see in the Sunday paper. They might look more “creative,” but their open rates are horrible. It’s as if those email marketers assumed that subject lines have to jump off the screen and “GRAB THE READER’S ATTENTION!” or something. Unfortunately, most people get so much junk mail in their inbox, anything that even hints of spam gets thrown away immediately.

Study: Best and Worst Subject Lines by Open Rate

If you’ve heard it once, you’ve heard it a thousand times: subject lines matter when it comes to email marketing. Think of subject lines like the headline of a newspaper article. If it grabs you, you start to read. If the first few paragraphs keep you engaged (similar to an email sweet spot), you keep on going.

Man Bites Giraffe: Some Awesome (and Awful) Email Subject Lines by MarketingProfs

E-mail users are receiving an increasing number of bounceback spam, known as backscatter, and security experts say this kind of spam is growing
100 e-mail bouncebacks? You’ve been backscattered.