20 Subject Line Tips That Increase Opens 61.8%


Obviously, if your email subject doesn’t get opened, it’s all over. No clicks. No sales Nothing. But with the right one, you can get your readers to open and devour your emails.

So here are 20 raw tips for subject lines that get results.

1. Short is better

40% of emails are opened on mobile and will be cut off if they are too long. Aim for 50 characters or less.

Another reason shorter is better: it’s more eye-catching. Compare these two subject lines and ask yourself which would get your attention:

a) “Warning!”

b) “Warning, this early morning habit of yours may be causing a serious problem”

For the best of both worlds, keep this in mind: With most email programs, you can put “Notice!” in the subject line and use “This morning habit of yours could be causing a serious problem” as the first line of the email, which will be displayed as preview text. As always, give it a try.

2. Still don’t think shorter is better?

According to Contact Monkey, subject lines with 3 or more words are opened 15% less than those with 1-2 words.

3. Don’t be cute

Some email senders like to start their subjects with “fw:” because they believe it increases open rates. But according to Convince and Convert, it actually reduces opens by 17%. However, Contact Monkey also reports that the top five subject lines in their recent study included “Re:” This just goes to show you the importance of testing.

4. Create urgency

Subject lines that evoke a sense of urgency and exclusivity receive a 22% higher open rate, according to the Email Institute. Use terms like “today only” and “12-hour giveaway” to encourage readers to act now.

5. DO NOT use the word “newsletter”

A study by Adestra found that email subject lines containing the word “newsletter” received an 18.7% decrease in open rates. Because? Maybe because the recipients think it will take too long to read, or they can always read it later; which of course they rarely do.

6. Use the person’s name in the subject line

Yes, it’s an old school trick. And yes, for a while it didn’t seem to work as well as it used to. But these days, people get so much email that, once again, having that little bit of personalization can make all the difference. In fact, Adestra found that personalized subject lines were 22.2% more likely to be opened.

Just don’t do it every time or it will lose its effectiveness.

7. Words to avoid

Reduced “Meeting” opens by 7% according to Sidekick.

“Quick” opening reduced by 17%.

“You” opens 5% reduced.

8. Words to use

“Tomorrow openings were up 10% according to Sidekick.

“Free” increased opens by 10%.

9. Test to find the correct sender name

If the recipient doesn’t recognize the sender’s name or doesn’t have a positive association with the sender, the email likely won’t be opened. If your business name implies a “Your Best Body” perk, try submitting from that name as well as “Joe Smith Your Best Body” and your full name “Joe Smith.” See which one opens up the most and then follow it.

10. Never use “[email protected] as your sender name

It creates a terrible impression, looks anything but nice, and prevents recipients from adding you to their address book.

11. Use list segmentation

You don’t want to send news of your kids’ clothing sale to a guy who only bought men’s work shirts. Customize each person’s experience based on the action they took: which list they joined and which product they bought.

12. Who says you need a subject line?

According to Sidekick, emails without a subject were opened 8% more than those with a subject. But use this trick sparingly, if at all. And remember, the preview text will be visible, so get it right.

13. Make readers feel like they’re inside

The psychology of exclusivity is one of the main motivators. Give your subscribers a sense of belonging to your group, tribe, or inner circle.

In other words, make them feel special with themes like this:

· “An exclusive offer just for you”

· “My personal gift to you”

· “Members only, you’re invited!”

· “Private: For Dear Customers ONLY”.

14. 3 words to use

Using the words “Offer”, “Video” or “New” in subject lines increases open rates.

15. Don’t stick and switch

Any promises made in the subject line must be kept in the email. For example, don’t say “27 free ebooks” and then try to sell them 27 ebooks that “look like they’re free because they’ll make you a lot of money.”

I actually received this email and that’s why I unsubscribed.

16. Tell them what’s inside and do it right

Just joined your list for a free book? Then your subject could be “Your New eBook Inside!” Are you advertising a new service perfect for them? “John, this service is tailor-made for you.”

17. Use numbers

“Increase your traffic by 200%” is better than “How to increase your traffic”.

18. Use action verbs

Think of a subject line as a call to action – you want the language to inspire people to click on the email. By starting with an action verb, you have a much better chance of motivating them to click. For example, which of these makes you want to know more: “Warning: New Nissans are here” or “Drive a new Nissan today”?

19. The words “Daily” and “Weekly” increase opening rates

But the word “Monthly” hurts them, according to Adestra.

20. Oh yes…

The word that increased opens by 61.8% according to Adestra? Believe it or not, it’s the word “alert”. Again, don’t overuse it, but reserve it for those times when it really counts.

You got your readers to open your email with a great subject line, but now what? This is your first sentence. And your second, and your third. You’ve heard how the purpose of the first sentence of a sales letter is to get them to read the second, and the second is to get them to read the third. Treat your emails the same way, as every sentence counts.

Because it does.