100+ Powerful Email Subject Lines to Lift Campaign Open Rate

No doubt that in email marketing, subject lines are so important – they work!

best email subject lines

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Ready Compendium of 100+ Click-Worthy Email Subject Lines to Skyrocket your Campaign’s Open Rate
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    Subject lines causing FOMO
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    Subject lines delivering Information
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    Ego-boosting Subject lines
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    Personalized Subject lines
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    Abandoned Cart Email Subject lines
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    Top power keywords
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    Top spam triggering words
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    Bonus Subject Lines for Ready for Customization

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The email subject lines are an essential component of any email marketing campaign. They are the first thing your recipients see when they receive your email. So, it’s a no-brainer that a well-drafted subject line can make your email campaign soar. Your subject line casts the first impression in your recipient’s mind, and they decide, literally within microseconds, whether they want to open and read your email.

There are so many factors that can influence the open rate of an email campaign. But the subject line is perhaps the most important. It’s the hook that captures your recipients, motivates them to take action, and lets them discover more about what you have to offer.

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So, what makes for a great email subject line? We have compiled a free ebook with 100+ subject lines that we found compelling. In addition to those, let’s discuss a few ideas that will help you skyrocket your email campaign’s open rate.

1. Keep it short and concise

Keep it short and concise

Shoot for a subject line that is around 41 characters or less. It will ensure that your entire subject line is entirely visible on most devices, including smaller screens such as smartphones and tablets.

2. Personalize it

personalize subject lines

Personalization is one of the most effective techniques in email marketing. Everybody likes when someone addresses them on a one-on-one level. It feels personal and special, doesn't it? So, people are more likely to open emails addressed directly to them. Try to use the recipient's name or other personalized details in your subject line. For example, "John, here's your exclusive discount code" is more likely to get opened than "Grab this Discount code!"

3. Make it clear and concise

personalize subject lines

Avoid using jargon or overly complicated language in your subject lines. Keep it simple and easy to understand for all age groups. Focus on clearly and concisely communicating your email's main gist, benefit, or value.

4. Use Power Words

Use Power Words

Avoid using jargon or overly complicated language in your subject lines. Keep it simple and easy to understand for all age groups. Focus on clearly and concisely communicating your email's main gist, benefit, or value.

5. Test Different Subject lines

Test Different Subject lines

Testing different subject lines to see which ones perform best is essential. It can be done through A/B testing, where you roll out two versions of your email with different subject lines to a small group of recipients and see which one generates a higher open rate.

6. Consider the context

Consider the context

Think about the context in which the recipients will receive your email. If you’re sending a promotional email, you want people to use the deal and make a purchase. If you’re sending a newsletter, you want your recipients to grasp the value and information you deliver.

7. Use emojis sparingly

Use emojis sparingly

While emojis can add a touch of personality and liveliness to your subject lines, it’s essential to use them sparingly. Overusing emojis can make your subject line look cluttered and unprofessional. In the worst case, the recipient email server can also mark it as spam.

The key to formulating the perfect email subject lines is to make them clear, concise, and compelling. If you follow these simple tips, you can create subject lines that will boost your email campaign open rates and drive more engagement resulting in better conversion. On the plus point, our ebook is also there to make that easier for you.


Remember to always be sincere and transparent in your email subject lines. Don’t make false or misleading promises, as this can damage your reputation and lead to lower open rates in the long run.

If you have any queries regarding this ebook, subject lines, or email marketing in general, feel free to reach out to our team.


1. How can you make the email subject lines more effective?

Personalization in email marketing is indispensable. It helps your email to stand out and not sound generic. Writing compelling, personalized content will help your business to grow not just an enterprise but also as a brand. 

2. Give examples of subject lines that create a sense of urgency?

Here are a few examples:-

  1. Limited Time Offer: 30% Off Ends Today!
  2. Don’t Miss Out! Only a Few Hours Left To Save
  3. “Immediate Action Required: Your Account Status”
  4. “Urgent: Don’t Miss Out On Exclusive Deals”

3. What should be the length of an email subject line?

A good rule of thumb is to keep your subject line to 41 characters or fewer. The length is critical to consider because you want your users to read the entire subject line in one go, even before they open the email. So, the length ensures that your subject line will be fully readable in most email clients without being cut off, especially on mobile devices.

4. What makes a good email subject line?

The subject line’s task is to stand out in the plethora of emails in the inbox, catch the recipient’s attention, and compel them to open the email. So, a good email subject line is clear, concise, and relevant to the content of the email.

5. How can one make the subject line more compelling?

You can use our ebook as the frame of reference and create subject lines customized to your needs. However, there are a few more strategies you can use to make your email subject line additionally compelling:
  • Follow these guidelines to ensure your email is not spammy to your recipient’s ISP.
  • Use numbers or statistics to make your subject line more specific, factual, trustworthy, and persuasive (e.g., “10 tips for improving your email open rates”)

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