The success of any email marketing campaign hinges on one tiny yet mighty detail: the email subject line.  

These simple lines can spark curiosity or send your message to the dreaded “ignore” bin.

Here’s a jaw-dropping fact: 64% of recipients choose whether to open an email solely based on the subject line. That’s how vital it is.

In this article, we’ll guide you through the art of creating irresistible subject lines for influencer emails. 

Before we delve into the intricate process of crafting influencer subject lines that truly engage, we must lay the groundwork by understanding the influencer’s audience. 

This involves a three-step approach to ensure that subject lines resonate effectively with their followers:

Understanding the Influencer Audience

targeting an audience

Understanding the influencer’s audience is a fundamental step in crafting effective subject lines. 

This involves identifying the target audience, knowing the influencer’s follower demographics, and aligning subject lines with the audience’s interests.

Identifying the Target Audience

To effectively communicate with their audience, influencers must first identify who they are trying to reach. This means creating a detailed profile of their ideal follower. 

This profile includes demographic information such as:

  • age, 
  • gender, 
  • location, 
  • income level, and 
  • occupation. 

Additionally, it delves into psychographics, encompassing interests, values, and lifestyles. 

This deeper insight allows influencers to create more relevant content and subject lines that truly resonate with their intended audience.

Knowing Influencer Follower Demographics

Influencers must delve into the demographics of their followers to create impactful subject lines. 

Follower demographics include aspects like age groups, gender distribution, geographic locations, and language preferences. 

This understanding helps influencers tailor subject lines to appeal specifically to different segments of their follower base.

Aligning Subject Lines with the Audience’s Interests

Crafting compelling subject lines requires a strong connection with the audience’s interests. 

Knowing what the audience cares about is crucial. Influencers need to have a clear picture of the topics, products, or experiences their followers are passionate about. 

By identifying these interests, influencers can create subject lines that evoke curiosity, excitement, or relevance, making followers more likely to engage. 

Understanding the audience’s pain points and desires also aids in tailoring subject lines that address their needs or aspirations, making them more relatable and engaging.

Key Elements of an Engaging Influencer Subject Line

In the following section, we’ll delve into the critical elements that compose engaging influencer subject lines. 

These factors, including clarity, personalization, creativity, curiosity, and the strategic use of trending topics, are the foundation for building connections with your audience.

Clarity and Brevity

When crafting influencer subject lines, it’s vital to keep them clear and concise. A subject line should communicate the message without ambiguity, making it easy for recipients to understand in a single glance. 

Also, short subject lines tend to perform better. As a matter of fact, over 85% of emails feature subject lines that are shorter than 90 characters


Because longer subject lines often get truncated, leaving recipients uncertain about the email’s content. This is especially critical for mobile users, who face stricter character limits on their smaller screens.

Personalization and Relevance

Personalization, such as using the recipient’s name or tailoring the subject line to their interests or previous interactions, greatly enhances the subject line’s appeal. 

It also greatly increases the chances that your emails will be opened and read.

In fact, personalized subject lines have been known to boost open rates by up to 50%.

In addition to personalization, relevance is crucial. Your subject lines should connect with the recipient’s needs and preferences.

When a subject line resonates with a recipient’s interests, they are more likely to open the email. The key is to create subject lines that feel like they were crafted just for them.

Creativity and Uniqueness

To avoid your messages disappearing in the sea of emails, it’s essential to create unique and catchy email subject lines. Striking that balance between clarity and clarity is key. 

Your subject line should be creatively composed to catch the recipient’s eye without becoming overly imaginative, ensuring that it remains clear and engaging. 

By finding this equilibrium, you can prevent your emails from blending in with the crowd, making them memorable and distinct.

Eliciting Curiosity and Emotion

Subject lines that arouse curiosity or evoke emotion tend to engage readers more effectively. 

Crafting a subject line that sparks curiosity, such as a thought-provoking question, can result in higher open rates. 

What’s more, incorporating emojis that complement the message, such as a smiling face for positivity or a question mark for curiosity, can also make your subject lines stand out in crowded inboxes.

In fact, research has shown that using emojis in email subject lines can increase open rates by as much as 56%

This underscores the compelling nature of subject lines that blend curiosity and emotion, making recipients not only curious but also emotionally connected to the content even before they’ve opened the email. 

Leveraging Trending Topics or Current Events 

Mentioning trending topics or current events in subject lines can make your content timely and relevant.

However, it’s crucial to ensure that these topics align with the audience’s interests.

By understanding and implementing these key elements, influencers can craft subject lines that capture the audience’s attention and encourage higher engagement with their content.

Examples of Effective Influencer Subject Lines 

In the following sections, we’ll explore real-world examples of influencer subject lines that have achieved remarkable results. 

From product promotions to behind-the-scenes glimpses, we’ll provide you with a treasure trove of subject line inspiration to boost your email marketing endeavors.

Product or Service Promotions:

  • “Get Glam with Me: Exclusive Makeup Discounts Inside!”
  • “Unboxing My Favorite Tech Gadgets – Grab Yours Now!”
  • “Sneaker Obsession: Limited-Edition Releases Await!”
  • “Unlock Wellness: Special Discounts on Health Products!”
  • “Trend Alert: Shop the Latest Fashion Must-Haves!”
  • “Kitchen Magic: Exclusive Deals on Cooking Gear!”
  • “Home Sweet Home: Savings on Decor and Furniture!”
  • “Gamer’s Paradise: Discounts on Hot Titles!”
  • “Tech Junkie’s Dream: Discounts on Gadgets!”
  • “Foodie Paradise: Discounts on Gourmet Treats!”
  • “Fitness Fanatics, Rejoice: Savings on Workout Gear!”
  • “Bookworm’s Haven: Discounts on Bestsellers!”
  • “Pamper Yourself: Beauty Product Discounts!”
  • “Adventure Awaits: Savings on Outdoor Gear!”
  • “Fashionista Alert: Exclusive Discounts on Designer Labels!”

Event Invitations:

  1. “You’re Invited: Join Me for an Epic Virtual Bash!”
  2. “VIP Access: Be Part of My Exclusive Live Event!”
  3. “Save the Date: A Night of Music and Fun Awaits!”
  4. “Unmissable Event: Your Invitation to the Party of the Year!”
  5. “Don’t Miss Out: RSVP to My Virtual Extravaganza!”
  6. “Night Out with Me: Let’s Celebrate in Style!”
  7. “Mark Your Calendar: A Night of Laughter and Entertainment!”
  8. “Party Time: Join My Virtual Gathering for an Unforgettable Night!”
  9. “Exclusive Entry: You’re on the VIP List for My Live Event!”
  10. “Get Ready to Have Fun: Your Event Invitation Inside!”
  11. “Join Me for a Virtual Hangout: It’s Going to Be a Blast!”
  12. “Celebration Alert: Save the Date for Our Online Get-Together!”
  13. “Interactive Event: Your Invitation to Join the Fun!”
  14. “Your Pass to Fun: RSVP to My Virtual Celebration!”
  15. “Celebrate with Me: An Exclusive Virtual Event Awaits!”

Collaboration Proposals:

  1. “Let’s Create Magic Together: Collaboration Offer Inside!”
  2. “Unlock Potential: Partner with Me for Success!”
  3. “Calling All Creatives: A Dream Project Awaits with Me!”
  4. “Join Forces: A Collaboration Opportunity Just for You!”
  5. “The Perfect Match: Let’s Create Something Amazing!”
  6. “Seize the Opportunity: Collaborate with Me on a Project!”
  7. “Your Future Project: Let’s Craft It Together!”
  8. “Explore New Horizons: A Collaboration Awaits with Me!”
  9. “Join Me in a Creative Journey: Collaboration Inside!”
  10. “Crafting Brilliance: Collaborate with Me for Impact!”
  11. “Together, We Shine: A Collaboration Offer for You!”
  12. “Artistry in the Making: Your Collaboration Awaits!”
  13. “Innovate with Me: A Collaboration Opportunity Beckons!”
  14. “Your Creative Partner: Let’s Bring Ideas to Life!”
  15. “Join Me for a Creative Adventure: Collaboration Inside!”

Contests and Giveaways:

  1. “Score Big: Win Exclusive Goodies in My Mega Giveaway!”
  2. “Giveaway Extravaganza: Prizes Galore Waiting for You!”
  3. “Unlock Your Luck: Join My Contest and Win Big!”
  4. “Gift Bonanza: Your Chance to Win Amazing Prizes!”
  5. “Contest Alert: Be a Winner with Me Today!”
  6. “Participate and Prosper: Win Fantastic Prizes Here!”
  7. “Get Lucky with Me: Exciting Contest Just for You!”
  8. “Winning Starts Now: Join My Contest Adventure!”
  9. “Claim Your Victory: Participate in My Contest Today!”
  10. “Contest Magic: Your Ticket to a World of Prizes!”
  11. “Join the Race: Win Fabulous Goodies with Me!”
  12. “Prize Bonanza: Your Key to Amazing Rewards!”
  13. “Dive into the Contest Fun: Win Big with Me!”
  14. “Contest Frenzy: Be a Winner in My Challenge!”
  15. “Success Awaits: Enter My Contest for Exciting Prizes!”

Personal Updates and Behind-the-Scenes Content:

  1. “Exclusive Peek: Behind the Scenes of My Daily Life!”
  2. “Join Me on My Adventure: A Day in My Life Revealed!”
  3. “Real Me Unveiled: Get to Know My Daily Routine!”
  4. “Explore with Me: My World of Personal Updates!”
  5. “Day in the Life: Discover My Secrets and Stories!”
  6. “My Unfiltered Journey: Updates and Insights Await!”
  7. “Life in the Lens: Join Me on My Personal Ride!”
  8. “Real and Raw: Dive into My Behind-the-Scenes Life!”
  9. “Adventure Awaits: Behind-the-Scenes Stories with Me!”
  10. “Discover My World: Exclusive Personal Updates!”
  11. “Personal and Real: Join Me on My Everyday Journey!”
  12. “Life Unscripted: Get to Know My Behind-the-Scenes!”
  13. “From Me to You: Personal Updates and More!”
  14. “The Unfiltered Truth: My Behind-the-Scenes Stories!”
  15. “Life Untold: Join Me on My Personal Odyssey!”

A/B Testing and Optimization of Influencer Subject Lines

Artist's impression of Mailvio's split-testing feature
With Mailvio, you can split-test different parts of your emails to see which ones perform the best

Testing your subject lines is not just a best practice; it’s a strategic imperative. 

A/B testing, also known as split testing, is a systematic approach that involves sending two or more variations of subject lines to different segments of your audience. 

This method allows you to analyze which subject lines perform best and, ultimately, increase your engagement rates. 

Implementing A/B testing is made a lot easier and more efficient with email automation tools like Mailvio

But why is it so crucial?

Enhanced Engagement: 

A/B testing provides valuable insights into what resonates with your audience. It’s a tool for refining your subject lines and ensuring they are genuinely engaging. By identifying what works, you can expect higher open and click-through rates.

Data-Driven Decision Making: 

Testing allows you to make decisions based on real data, not guesswork. It enables you to adapt and optimize your subject lines according to what your audience prefers, rather than relying on assumptions.

Continuous Improvement: 

The digital landscape is always evolving. What worked yesterday may not work tomorrow. A/B testing keeps your subject line strategies relevant and adaptable to changing preferences and trends.

Best Practices for A/B Testing

It’s time to explore the best practices for A/B testing to help you optimize your email marketing campaigns. 

The following guidelines are essential to ensure that your A/B tests provide meaningful insights and lead to actionable improvements in your email performance.

Define Clear Objectives:

Before conducting A/B tests, it’s crucial to define clear objectives. Determine your specific goals, whether it’s to boost open rates, click-through rates, or overall engagement. This clarity guides your testing strategy, ensuring that each test is aligned with your broader marketing objectives.

Segment Your Audience:

Effective segmentation is key to successful A/B testing. Divide your audience into segments that mirror your target demographics. This ensures that your A/B tests generate results that are applicable to your entire audience, allowing for more tailored and impactful email campaigns.

Change One Variable at a Time:

To pinpoint the elements responsible for performance improvements or declines, change one variable at a time within your email subject lines. 

For example, test different wording or emojis, but avoid altering multiple elements simultaneously. This approach provides a clear understanding of what works and what doesn’t in your email content.

Test at Optimal Times:

Understanding your audience’s activity patterns is essential. Test your subject lines during peak hours when your audience is most active. 

Doing so yields more accurate results, as it aligns your testing with your subscribers’ behavior, ultimately leading to more effective email marketing.

Statistical Significance:

Ensure the reliability of your A/B test results by having a sufficiently large test group. Utilize online calculators to determine the necessary sample size for statistical significance. 

This practice safeguards against drawing conclusions from small, unreliable data sets and allows you to make data-driven decisions with confidence.

Implementing Findings to Optimize Subject Lines

After conducting A/B tests and collecting valuable data, the next critical step is to effectively implement your findings to optimize your email subject lines.

This process involves several key elements:

Learning and Adapting:

Dive deep into the results of your A/B tests to gather valuable insights. Pay attention to what resonates with your audience, whether it’s specific words, emotional triggers, or emerging trends. Understand what elements make your subject lines more compelling and engaging for your recipients.

Remember – it’s crucial to gain a deep understanding of your audience’s preferences and behaviors. Different segments of your audience may respond differently to various subject line strategies, so tailor your subject lines to match the preferences of each specific group.

Iterative Approach:

Keep in mind that optimization is a continuous, iterative process. Regularly test and fine-tune your subject lines to ensure they remain relevant and effective. As your audience evolves and changes, so should your subject lines.

Make sure to always stay attuned to the ever-changing digital landscape and market trends. What worked well in the past may not work as effectively in the future, so be ready to adapt to these changes.


Artist's impression showing how email marketing personalization allows for better targeting

If your A/B tests indicate that personalization strategies enhance engagement, incorporate them consistently in your subject lines. Personalization can include:

  • addressing recipients by name, 
  • referring to their previous interactions, or 
  • customizing content based on their preferences.

Make it a habit to customize your subject lines to cater to the specific interests and needs of your audience segments. Make your subscribers feel like the content is designed just for them, which can significantly increase engagement.

Engage with Your Audience:

With Mailvio, you can closely monitor engagement metrics such as open rates, click-through rates, and responses. These metrics provide insights into the effectiveness of your subject lines. Analyze this data to identify subject lines that are working well and those that need improvement.

Then, start to actively engage with your audience to gain a deeper understanding of their expectations and preferences. Respond to feedback, conduct surveys, and hold discussions to collect qualitative data that complements quantitative metrics.

Use the feedback and insights you gather from your audience to refine your subject lines further. By incorporating their input, you can create subject lines that are more aligned with their expectations.

Avoiding Common Email Marketing Mistakes 

Crafting engaging subject lines for influencer emails is only part of the equation for success; avoiding common mistakes in your subject lines is equally vital. 

Here, we’ll delve into these pitfalls and provide guidance to ensure your subject lines contribute positively to your influencer campaigns.

Overly Promotional Subject Lines:

Using subject lines that are too salesy or promotional can be off-putting to your audience. It’s important to strike a balance between providing value and promoting products or services.

People receive a barrage of promotional content daily, and if your subject lines are too pushy, they may mark your emails as spam or unsubscribe. 

Instead, focus on conveying the benefits of your offerings without being overly aggressive. 

For example, instead of “Buy Now for 50% Off!” try “Unlock Exclusive Savings: Limited Time Offer Inside!”

Deceptive or Clickbait Subject Lines:

Luring recipients with deceptive or clickbait subject lines may result in short-term gains but can damage your long-term credibility and trust with your audience. It’s crucial to maintain transparency and integrity in your subject lines.

When your subject lines promise something inquisitive or exciting, ensure that your email content lives up to those expectations. 

For instance, if your subject line teases an exciting announcement, make sure the email indeed contains that announcement, thus keeping your audience engaged and trustworthy.

Failing to Deliver on Promises:

Keeping promises made in your subject lines is paramount to retaining your audience’s trust. 

If you make a commitment or offer in the subject line, your email content must deliver on it.

If your subject line hints at valuable insights, exclusive deals, or special access, ensure that your recipients find these within your email. 

Failing to do so can lead to dissatisfaction and unsubscribes, eroding your credibility.

Neglecting Mobile Compatibility:

mobile optimized websites

Not optimizing for mobile viewing is one of the most common email marketing mistakes for influencers. With mobile accounting for 42% of all email opens, neglecting mobile equals leaving money on the table. 

Your subject lines may not matter if the recipient can’t easily access your content on their mobile device.

Ensure that your emails are mobile-responsive, adapting seamlessly to various screen sizes. Test them on different devices to guarantee that they look and function as intended.

Ignoring Platform-Specific Guidelines:

Different email platforms and providers have specific rules and guidelines governing subject lines. Ignoring these guidelines can result in your emails being flagged as spam or filtered out of recipients’ inboxes.

Familiarize yourself with the specific rules and requirements of the platforms you use to distribute your emails. Adhering to these guidelines ensures that your emails reach their intended audience and aren’t inadvertently labeled as spam.


Crafting engaging subject lines for influencer emails is a pivotal component of any successful influencer marketing campaign. 

A well-crafted subject line has the power to grab the attention of influencers and entice them to open your email, setting the stage for a fruitful collaboration. 

Remember, influencer outreach is all about building genuine relationships and delivering value to both parties involved. A compelling subject line is your first step toward creating that connection.

To put your newfound knowledge into action and supercharge your influencer outreach, we recommend trying Mailvio’s email marketing platform. 

With its user-friendly features and powerful tools, you can streamline your email campaigns and optimize your subject lines for maximum engagement. 

Sign up for Mailvio’s 7-day free trial today and experience firsthand how influencers can benefit from using email marketing tools like never before.

Neil Napier

Neil Napier is the co-founder of Mailvio. Neil started his entrepreneurial journey in 2012 out of necessity to keep his visa in the UK, when he failed to keep his visa he moved to Finland and started his career as a serial entrepreneur and super affiliate. With over $10 million USD in revenue generated, he is a sought-after expert entrepreneur, copywriter & product creator.


    1. Thank you, recipeguru!

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.