Rivalry2

HTML Diff

0 added 1 removed

Original 2026-01-01

Modified 2026-03-10

1 Anemail headeris the top part of an email. It contains important information, like the sender and recipient’s<a>email addresses</a>and the email date and subject. It also includes any content preceding the email’s text, such as images, contact info, or a company logo.

2 By clarifying who the email is from and what it contains, headers help recipients determine whether the email is genuine or a<a>phishing attempt</a>.

3 - <h2>What does an email header contain?</h2>

4 These are the essential parts of every email header:

3 These are the essential parts of every email header:

5 <ol><li>Header information</li>

4 <ol><li>Header information</li>

6 <li><a>Subject line</a></li>

5 <li><a>Subject line</a></li>

7 <li>Header content</li>

6 <li>Header content</li>

8 </ol>Ensuring your email header contains all components helps leave a good first impression. If the email header isn’t properly organized and well-designed, your<a>subscribers</a>could skip reading your emails altogether.

7 </ol>Ensuring your email header contains all components helps leave a good first impression. If the email header isn’t properly organized and well-designed, your<a>subscribers</a>could skip reading your emails altogether.

9 <h3>Header information</h3>

8 <h3>Header information</h3>

10 Header information is the mandatory technical information in the fields that someone sees after opening an email. The fields contain data such as:

9 Header information is the mandatory technical information in the fields that someone sees after opening an email. The fields contain data such as:

11 <ul><li>Sender information:Indicating the sender’s email address, this section confirms the sender is legitimate and the email isn’t a scam.</li>

10 <ul><li>Sender information:Indicating the sender’s email address, this section confirms the sender is legitimate and the email isn’t a scam.</li>

12 <li>Recipient information:This field shows one or more email addresses that received the email.</li>

11 <li>Recipient information:This field shows one or more email addresses that received the email.</li>

13 <li>Date:The date field shows the day, month, year, and time the email was sent.</li>

12 <li>Date:The date field shows the day, month, year, and time the email was sent.</li>

14 </ul>The<a>CAN-SPAM Act</a>dictates the rules regarding these essential elements, and not following them in your emails could result in hefty fees. Make sure that you’re using<a>the right tool</a>in your<a>email marketing</a>efforts, and that you’re not deceiving your recipients.

13 </ul>The<a>CAN-SPAM Act</a>dictates the rules regarding these essential elements, and not following them in your emails could result in hefty fees. Make sure that you’re using<a>the right tool</a>in your<a>email marketing</a>efforts, and that you’re not deceiving your recipients.

15 <h3>Subject line</h3>

14 <h3>Subject line</h3>

16 Your audience sees your email’s subject line before even opening the email, so it’s important to make it engaging enough to invite them to keep reading.

15 Your audience sees your email’s subject line before even opening the email, so it’s important to make it engaging enough to invite them to keep reading.

17 Here are a few best practices for creating the perfect subject line for your emails:

16 Here are a few best practices for creating the perfect subject line for your emails:

18 <ul><li>Capture the essence of your email:Don’t use vague or misleading text in your subject line. Keep the text concise and clear so that it’s easy to understand what the email is about just by reading the subject line.</li>

17 <ul><li>Capture the essence of your email:Don’t use vague or misleading text in your subject line. Keep the text concise and clear so that it’s easy to understand what the email is about just by reading the subject line.</li>

19 <li>Keep it short:Make your subject line short and catchy by keeping it under 40-50 characters.</li>

18 <li>Keep it short:Make your subject line short and catchy by keeping it under 40-50 characters.</li>

20 <li>Align the tone with the email’s goal:Subject lines can be funny, convey urgency, or harness fear of missing out (FOMO) to<a>engage recipients</a>. Choose your ideal subject line tone based on your email’s goal.</li>

19 <li>Align the tone with the email’s goal:Subject lines can be funny, convey urgency, or harness fear of missing out (FOMO) to<a>engage recipients</a>. Choose your ideal subject line tone based on your email’s goal.</li>

21 <li>Watch out for spammy words:Avoid words that could<a>trigger spam</a>filters and tank<a>email deliverability</a>. These may be terms like “cash,” “credit,” “income,” or “deal.”</li>

20 <li>Watch out for spammy words:Avoid words that could<a>trigger spam</a>filters and tank<a>email deliverability</a>. These may be terms like “cash,” “credit,” “income,” or “deal.”</li>

22 <li>Make recipients feel special:Personalize your subject line to capture the recipient’s attention and increase your<a>email open rate</a>.</li>

21 <li>Make recipients feel special:Personalize your subject line to capture the recipient’s attention and increase your<a>email open rate</a>.</li>

23 </ul>💡Pro tip:Advanced<a>marketing automation</a>tools like Klaviyo offer<a>AI assistance</a>for writing personalized and engaging subject lines.

22 </ul>💡Pro tip:Advanced<a>marketing automation</a>tools like Klaviyo offer<a>AI assistance</a>for writing personalized and engaging subject lines.

24 <h3>Header content</h3>

23 <h3>Header content</h3>

25 Header content takes up the area above the email’s copy. Although it’s not essential, adding header content helps you personalize your emails and improve your subscribers’ experience.

24 Header content takes up the area above the email’s copy. Although it’s not essential, adding header content helps you personalize your emails and improve your subscribers’ experience.

26 Depending on your email content and brand details, your header content can include elements such as:

25 Depending on your email content and brand details, your header content can include elements such as:

27 <ul><li>Logo</li>

26 <ul><li>Logo</li>

28 <li>Banner</li>

27 <li>Banner</li>

29 <li>Contact info</li>

28 <li>Contact info</li>

30 <li>Menu</li>

29 <li>Menu</li>

31 </ul>Here are a few best practices to maximize the potential of this area:

30 </ul>Here are a few best practices to maximize the potential of this area:

32 <ul><li>Focus on versatility:Create a versatile header that you can easily adapt to different types of emails.</li>

31 <ul><li>Focus on versatility:Create a versatile header that you can easily adapt to different types of emails.</li>

33 <li>Keep it short and sweet:Don’t make your header longer than the email copy-it needs to complement the email’s content, not steal its spotlight.</li>

32 <li>Keep it short and sweet:Don’t make your header longer than the email copy-it needs to complement the email’s content, not steal its spotlight.</li>

34 <li>Highlight your brand:Add your company’s logo and contact info in the header, and use your brand’s colors, font, and slogan (if you have one). This will help the recipients easily memorize your brand andconfirm your emails’ legitimacy.</li>

33 <li>Highlight your brand:Add your company’s logo and contact info in the header, and use your brand’s colors, font, and slogan (if you have one). This will help the recipients easily memorize your brand andconfirm your emails’ legitimacy.</li>

35 <li>Add a menu:Guide your recipients to take specific actions from your email by creating a functional menu in your header. Make sure the menu corresponds to the email’s content-for example, if the email promotes a product, create a menu that redirects your recipients directly to this item on your website.</li>

34 <li>Add a menu:Guide your recipients to take specific actions from your email by creating a functional menu in your header. Make sure the menu corresponds to the email’s content-for example, if the email promotes a product, create a menu that redirects your recipients directly to this item on your website.</li>

36 </ul><h2>Send smart emails that convert</h2>

35 </ul><h2>Send smart emails that convert</h2>

37 Klaviyo is a marketing automation tool that eliminates the stress of designing email headers with its email templates. With over<a>100 customizable templates</a>, Klaviyo makes it easy to not only create your headers, but also add images, logos, and functional menus to your emails. After creating a header, you can save it and add it to your future emails.

36 Klaviyo is a marketing automation tool that eliminates the stress of designing email headers with its email templates. With over<a>100 customizable templates</a>, Klaviyo makes it easy to not only create your headers, but also add images, logos, and functional menus to your emails. After creating a header, you can save it and add it to your future emails.

38 Email templates are only a drop in the bucket of Klaviyo’s email marketing features:

37 Email templates are only a drop in the bucket of Klaviyo’s email marketing features:

39 <ul><li><a>Segmentation</a>:Use predictive analysis, shopping behavior, or another criterion to<a>categorize your audience</a>and hyper-personalize your messages for specific groups, or<a>segments</a>.</li>

38 <ul><li><a>Segmentation</a>:Use predictive analysis, shopping behavior, or another criterion to<a>categorize your audience</a>and hyper-personalize your messages for specific groups, or<a>segments</a>.</li>

40 <li><a>Campaigns</a>:Create<a>email campaigns</a>that resonate with your audience whenever you want to announce a new product, make a sale, or<a>share an important update</a>.</li>

39 <li><a>Campaigns</a>:Create<a>email campaigns</a>that resonate with your audience whenever you want to announce a new product, make a sale, or<a>share an important update</a>.</li>

41 <li><a>Flows</a>:Use 60+ pre-built flow templates to create<a>automated emails</a>that send based on specific actions recipients take, like ordering one of your products.</li>

40 <li><a>Flows</a>:Use 60+ pre-built flow templates to create<a>automated emails</a>that send based on specific actions recipients take, like ordering one of your products.</li>

42 <li><a>Reporting</a>:Track your marketing campaign’s performance and make any necessary adjustments.</li>

41 <li><a>Reporting</a>:Track your marketing campaign’s performance and make any necessary adjustments.</li>

43 <li><a>350+ pre-built integrations</a>:Centralize data from across your tech stack and activate it into personalized, timely customer experiences.</li>

42 <li><a>350+ pre-built integrations</a>:Centralize data from across your tech stack and activate it into personalized, timely customer experiences.</li>

44 </ul>Ready to create catchy email headers and launch your campaigns?<a>Sign up for Klaviyo</a>and create personalized messages that convert.

43 </ul>Ready to create catchy email headers and launch your campaigns?<a>Sign up for Klaviyo</a>and create personalized messages that convert.