Subject line is the part of the email that subscribers see when it lands in their inbox. They use it to judge whether an email is worth opening. After the registration in SendPulse, you're welcome to use the instruments that will boost your open rate.

The SendPulse marketer in this video suggests 10 best practices for creating strong subject lines that make subscribers want to open your emails.

Tips on effective subject line

Personalize your subject line

Marketers have found that emails with personalized subject lines are 26% more likely to be opened. Why? Person's name is the sweetest sound of all the people. Fortunately, email marketing is constantly developing and a user's name is not the only variable for personalization, it depends on your creativity. If you want to personalize your email campaign, but don't have all the necessary data, SendPulse offers a great solution — smart personalization.

Personalized subject line

Keep it short

More than 40% of newsletter subscribers open on their mobile device first. That’s why it’s better to make the subject line short, so it isn't cut off automatically. Besides, not all the users tend to read them up to the end, moreover, if it does not grab attention. Make the first words the most powerful and informative.

Short subject line

Make the balance between subject line and preheader

Don’t forget about the preheader text that is displayed near the subject line. It’s like a preview of your email content explained in several words. Don't make it the same as the subject line.

Accompany your subject line with a preheader

Fill in the senders field correctly

  1. If you address your email from yourself, then enter your name and last name. 

  2. If you address your email from a company, then enter the name of the company.Sender's field

Make it intriguing

People are curious that is why secrets and mysteries will arouse interest.

Intriguing subject line

Ask questions

Question in the subject line will make a recipient feel a real communication with you. They will answer it or find the answer in your email.

Question in a subject line

Use numbers

We like numbers because they provide us with some concrete but not abstract information. Numbers give a better idea about some issues.

Numbers in a subject line

Create a sense of urgency

Urgency is a great trick played by all the marketers during sales, discounts, Black Friday. Due to the sense of urgency, so many people make purchases on impulse. 

 Sense of urgency in a subject line

Carry out split-testing

If you doubt between several interesting subject lines or not sure whether it is appropriate to use some elements in a subject line or not (like GIF, emoji, fonts), create an A/B test. It will help you to discover the best practices for specific segments of your mailing list. Read here how to create and send an A/B test in SendPulse.

Use emoji

Do you remember the last time you smiled after reading a subject line? Emoji will not only make your subscribers smile but make your email more pleasant and friendly. Emoji appeal to emotions and this is a great benefit. They are not a real black in email marketing right now but some marketers risk and get conversions! Read our article to discover the reasons why you should use emoji. You can add emoji to your emails in our service.

Emoji in a subject lineEmoji in a subject line

There are more methods to create an original subject line. Use humor, special values — like a free downloading of an ebook, some stylistic devices — rhyme, alliteration, metaphors. Be creative in your choice and test!

To learn more about personalization in subject lines, read this article.

Remember, you can always test all your crazy ideas to see what sticks!

Increase subscriber engagement!

SendPulse allows to craft personalized subject lines and A/B test them to increase your email open rates. 

Register and create an email campaign!

SendPulse instruments for high-performing subject lines

We offer several professional instruments to increase your subject line performance totally for free.

Personalization and smart personalization

These instruments imply inserting personal information about subscribers into a subject line, for example, name, gender, location. It makes an email relevant for every recipient and increases engagement.

Smart personalization is useful when you don't have the same information about every your subscriber, for example, name. In this case, you can specify the text for those users. Thus, every subscriber receives a personalized message.


This is a form of research which helps determine the most effective variant of the element tested. Create different ones and test which one performs better.

Our free pricing plan will help you enjoy all the benefits of email marketing. Have less than 2500 subscribers? Send 15,000 emails for free every month!


  1. The article "How to Write Catchy Email Subject Lines: 19 Tips" on HubSpot blog suggests proven techniques on how to create high-performing subject lines.
  2. The article "164 Best Email Subject Lines to Boost Your Email Open Rates (2019)" on OptinMonster blog offers tips for different types of subject lines.
  3. The article "How to write an excellent email subject line" on Business Insider offers 18 tips to create excellent subject lines.
  4. The article "Digital Marketer’s 101 Best Email Subject Lines of 2018 (…And 7 Top-Notch Subject Lines Pulled from the Vault)" on Digital Marketer blog offers tips to create a subject line and provides examples.

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