How to Boost Your Email Engagement Metrics + A Pro Tip!

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Good email engagement is the strongest indicator that you and your email marketing subscribers are on the same page. But how do you measure it?

By tracking email engagement metrics, of course.

Sending out irrelevant email blasts to your email list is a surefire way to fail at email marketing. If you want to cash in on the high-ROI marketing channel that is email, you must engage your audience.

Below, we break down various email engagement metrics and explain the role played by each in email marketing success.



What is Email Engagement?

Email engagement is a term in email marketing that refers to the level of interaction a recipient has with a message. It’s a measure of how interested a subscriber is in the content and how likely they are to take action.

Email engagement is important because:

  • Engaged subscribers are more likely to make purchases or take desired actions.
  • When subscribers interact consistently with your content, they feel a stronger connection to your brand.
  • It tells you what your customers like, helping you refine email campaigns.
  • Email marketing is the most affordable way to reach a wide audience, and engagement demonstrates interest and potential for conversions or sales.
  • It can set your brand apart from competitors.

What are Email Engagement Metrics?

Email engagement metrics are data points that tell you how your email marketing subscribers feel about your emails.

They are key performance indicators (KPIs) that measure how well your email campaigns are performing. Besides telling you whether your content is effective or not, these email campaign metrics can also guide you toward further improving your email strategy.

To fully understand your engagement, you must track the metrics below:

MetricWhat is it?
Open RateThe percentage of recipients who open your email.
Click-through Rate (CTR)The percentage of recipients who click on a link within your email.
Email Marketing Conversion RateThe percentage of recipients who take a desired action, such as making a purchase or signing up for a newsletter.
Email Bounce RateThe percentage of emails that are undeliverable due to invalid email addresses or server issues.
Email Unsubscribe RateThe percentage of recipients who unsubscribe from your email list.
Spam ComplaintsThe number of recipients who mark your email as spam.
Email engagement metrics

There’s more to email engagement metrics than such simple definitions; let’s analyze them in more detail below.


Open Rate: The First Sign of Email Engagement

In email marketing, the open rate is the percentage of recipients who open a specific email out of the total number of emails sent. It’s a key email engagement metric used to measure the effectiveness of your email campaigns.

How to Calculate Open Rate?

The formula to calculate open rate:

Open rate = (Total unique opens/Total emails delivered) X 100

Here, the unique opens is the number of distinct recipients who opened the email at least once. Even if a recipient opens the email multiple times, they are counted only once. The “total emails delivered” is the number of emails that successfully reached recipients’ inboxes. You can find this number by subtracting bounced emails from the total emails sent.

What Does the Open Rate Tell You?

The open rate is an essential indicator of how compelling your subject line and email preheader are.

But open rates have different meanings, depending on context; open rates can refer to:

  1. Unique open rates: This notes a unique open by a unique subscriber.
  2. Total open rates: This measures the total number of times an email is opened.
  3. Robot open rates: These include opens by Apple Mail or Gmail to create AI previews or summarized notifications.

You can get a better idea of open rate benchmarks from this article: “What is a Good Open Rate for Email?

To sum things up: Given the high number of robot opens nowadays, due to features such as Apple’s Mail Privacy Protection, your benchmark must change. A “good” open rate today should be 10-15% higher than what you thought a good open rate was a couple of years ago.

A good open rate reflects:

  • Subject line effectiveness: A strong subject line can entice recipients to open the email, while a weak or unclear one may result in lower opens.
  • Sender reputation: If you’re seeing a low open rate, it could your emails are landing in spam or being ignored. This may indicate deliverability issues or that recipients don’t trust your email sender name.
  • Audience engagement: A higher open rate suggests that your audience finds your emails interesting or relevant, while a low open rate may signal a disconnect between the content you’re sending and your recipients’ interests.

Before you decide if your open rate is bad, check what is a good open rate for emails in your industry. Additionally, if you’re sending cold emails, note that cold email open rates are different from those of email subscribers.

How to Address Low Open Rates

If you’re seeing a low open rate, consider these steps to improve it.

  1. Optimize email subject lines: Use clear, concise, and personalized subject lines that generate curiosity.
  2. Adopt email personalization: Include the recipient’s name in the subject line or preview text to create a sense of personal connection.
  3. Use an email segmentation strategy: Create specific groups based on interests, behaviors, or demographics.
  4. Ascertain the best time to send emails: Experiment with different days and times to find when your audience is most likely to check their inbox.
  5. Improve your email sender reputation: Consistently send high-quality, non-spammy emails and ask your subscribers to add your email address to a safe senders list.

Click-through Rate (CTR): Do Readers Like What You’re Offering?

The clickthrough rate (CTR) measures how many recipients clicked on a link within your email. It shows you the engagement and effectiveness of your email content and calls to action (CTA).

How to Calculate Click-Through Rate (CTR)?

The formula to calculate CTR:

CTR = (Unique clicks/Total emails delivered) X 100

In the above formula, “unique clicks” refers to the number of individual recipients who clicked on any link in the email. For example, if 50 out of 1,000 delivered emails resulted in subscribers clicking on links, your CTR would be 5%.

CTOR or Click-To-Open-Rate is another metric that can be useful in certain situations; it measures the number of unique clicks against unique opens.

To calculate it, use this formula:

CTOR = (Unique clicks/unique opens) X 100

What Does the CTR Tell You?

The click-through rate (CTR) measures how many recipients clicked on the links in your email, which shows:

  • Whether your content is engaging: A high CTR suggests that your content is engaging, and if it’s low, it means your content needs to improve.
  • Whether the email content is relevant: If recipients are clicking through, the content likely resonates with their needs or interests. If not, it may need split testing.
  • If your CTAs are effective: A clear and persuasive email CTA can drive higher clicks. A low CTR might indicate weak or unclear CTAs.

How to Boost Click-Through Rates

To improve CTR, you can:

  1. Improve the CTA: Make your CTA buttons more prominent and use action-oriented language, like “Get Started,” “Download Now,” or “Learn More.”
  2. Enhance email design: Use visually appealing, mobile-optimized designs with clear sections to make the email easy to navigate.
  3. Personalize the content: Use dynamic content and segmentation to tailor messages to each recipient’s interests.
  4. Implement A/B testing: Experiment with different link placements, colors, and wording to see what drives the most clicks.

Email Bounce Rates: Big Engagement Problem, Easy Fix

The bounce rate is the percentage of emails that cannot be delivered to the recipient’s inbox. It indicates email address validity or server issues, which affects email delivery rates.

How to Calculate Bounce Rate?

The formula to calculate bounce rate:

Bounce rate = (Bounced emails/Total sent emails) X 100

Here, the bounced emails indicate the total number of emails that were returned as undeliverable.

This includes both soft and hard bounces:

  1. Soft bounces: A temporary email delivery failure because of a full inbox, network issues, or server problems. This may have a minor negative impact on sender reputation.
  2. Hard bounces: A permanent email delivery failure due to an invalid or nonexistent email address. A hard bounce can significantly damage sender reputation.

What Does the Bounce Rate Tell You?

The bounce rate provides insight into the health of your email list:

  • List quality: A high bounce rate indicates your contact list has outdated or invalid email addresses, which can harm your sender reputation.
  • Delivery issues: Bounced emails may point to issues with your email setup or problems with the recipient’s server.
  • Segmentation issues: If you’re sending emails to recipients who didn’t opt-in or who are inactive, your bounce rate may increase.

How to Reduce Bounce Rates

To lower your bounce rate, try these steps:

  1. Email validation: Regularly remove invalid, inactive, or misspelled email addresses. Use email verification tools like ZeroBounce or Kickbox.
  2. Use a double opt-in method: This helps ensure recipients genuinely want to receive your emails, leading to a more accurate email list.
  3. Monitor bounces: Remove hard bounces immediately, and keep an eye on soft bounces (temporary delivery issues) over time.
  4. Check blacklists: Check popular industry blacklists to see if you are blacklisted. If you are, follow the steps to get yourself delisted.
  5. Authenticate your email domain: Set up proper email authentication (SPF, DKIM, DMARC) on your domain to improve deliverability.

Your Conversion Rate is A Success Metric for Email Engagement

The conversion rate measures the effectiveness of your email campaigns in driving desired outcomes and generating revenue. It shows the percentage of recipients who took the desired action after receiving your email.

How to Calculate Conversion Rate?

Here’s how you can calculate your conversion rate:

Conversion rate = (Conversions/Total sent emails) X 100

“Conversions” in the above formula refers to the number of recipients who took the desired action. For example, if 1 recipient out of 5,000 subscribers who received your email made a purchase, your conversion rate would be 0.02%.

In the above example, we’ve used total sent emails as the denominator, but it can be replaced by other email engagement metrics such as unique clicks or number of emails sent to a specific segment.

What Does the Conversion Rate Tell You?

The conversion rate measures how many recipients completed a desired action — such as making a purchase or signing up for a webinar — after clicking a link in the email.

Here’s what you can deduce from it:

  • The effectiveness of your campaign: A high conversion rate means your email content, design, and offers are aligned with what your audience wants. A low rate may indicate dissonance between what you’re sending and what your audience wants.
  • Your CTA relevance: If recipients are converting, your CTA and landing page must be closely aligned with the content and value offered in the email.
  • Accuracy of targeting: High conversions reflect that the right people received the right message at the right time.

How to Improve Conversion Rates

To boost conversion rates, try these 7 tips:

  1. Align your CTA with landing pages: Ensure the landing page matches the offer in the email, providing a smooth and cohesive experience.
  2. Send different types of email campaigns: Some emails work better than others. Understand what your audience likes more.
  3. Use email A/B testing: Create segments for testing and uncover what your subscribers want by testing different email content and elements.
  4. Offer value: Focus on the benefits and incentives that make taking the action (e.g., buying a product) irresistible.
  5. Streamline the process: Make it easy for recipients to convert — reduce the number of steps required on the landing page.
  6. Focus on targeted email marketing: Ensure your emails are being sent to a relevant, segmented audience to increase the likelihood of conversions.
  7. Use urgency or scarcity: Create a sense of urgency with limited-time offers or low-stock alerts to drive action.

The Unsubscribe Rate Indicates Room for Improvement

The unsubscribe rate is a measure of subscriber satisfaction and the relevance of your content — it’s the percentage of recipients who opted out of your email list.

How to Calculate Unsubscribe Rate?

To calculate your unsubscribe rate, use this equation:

Unsubscribe rate = (Total unsubscribes/Total delivered emails) X 100

So, if 5 people unsubscribe out of 1,000 delivered emails, your unsubscribe rate would be 0.5%.

What Does the Unsubscribe Rate Tell You?

Let’s assume your email lead generation methods are perfect. If you still find contacts unsubscribing, your emails are not delivering relevant content, or you have not set the right expectations,

Additionally, you can also infer from a high unsubscribe rate that:

  • You may be sending irrelevant content: Your content is irrelevant to your audience, or you’re emailing too frequently.
  • You aren’t matching audience preferences: Your email frequency or tone doesn’t align with what subscribers expect.
  • Your list quality isn’t great: You’re not targeting the right people.

How to Fix a High Unsubscribe Rate

These steps can help reduce unsubscribe rates:

  1. Use email segmentation: Send more targeted and relevant emails based on audience preferences, behavior, or demographics.
  2. Adjust email frequency: Consider allowing recipients to manage their email preferences by offering options to receive fewer emails rather than opting out completely.
  3. Improve email content: Continuously test different types of content (news, promotions, tips) to see what resonates with your audience.
  4. Send mass personalized emails: Use personalization to make your emails more relevant and valuable to the individual.
  5. Try re-engagement email campaigns: Send win-back campaigns to inactive subscribers to remind them of the value they get from your emails.

High Spam Complaint Rates Need Urgent Attention

The spam complaint rate measures the perceived relevance and quality of your emails, affecting your sender reputation and deliverability. It’s the percentage of recipients who marked your email as spam.

How to Calculate Spam Complaint Rate?

If you want to know your spam complaint rate, this formula shows you how:

Spam complaint rate = (Spam complaint/Total delivered emails) X 100.

In short, if 2 recipients out of 1,000 marked your email as spam, your spam complaint rate would be 0.2%.

What Does the Spam Complaint Rate Tell You?

Spam complaints indicate the 4 issues listed below:

  1. Your content is spammy: A high spam complaint rate suggests that recipients either didn’t find your content valuable or relevant or they didn’t recognize your email.
  2. You’re sending too many emails: Emails that are sent too frequently end up getting reported as spam.
  3. You’re selling too hard: If your messages contain overly aggressive sales tactics, your readers will file spam complaints.
  4. Unclear opt-in: It’s possible that your subscribers were not aware they signed up for emails. Establish a clear signup process or use a double opt-in.
  5. Poor email authentication: If there are issues with your DNS records and mailbox providers can’t verify your identity, you could get marked as spam.
  6. Your ESP has a poor reputation: If you use a low-quality email platform to send emails, you could get hit with spam complaints.

Of all the metrics, the spam complaint rate is the most dangerous; email marketers must reduce it at all costs.

How to Tackle High Spam Complaint Rates

To lower your spam complaint rate:

  1. Only email those who explicitly opted in: Send emails to people who have opted in and are actively engaging with your content.
  2. Improve your subject lines: Ensure your subject lines are honest and reflect the content of the email.
  3. Set expectations: When users subscribe, clearly outline the type and frequency of emails they will receive in a welcome email campaign.
  4. Simplify unsubscribing: Include a clear and visible unsubscribe link in every email to avoid frustration and spam complaints.

The Number 1 Tip to Maximize Email Engagement Metrics

Before you can clock conversions, you need click-throughs. For click-throughs, you need email opens. For email opens, you need email delivery.

But what if your delivered emails make a beeline for the spam folder? This is why your top priority to boost email engagement is to ensure you have a good email deliverability rate.

Our top tip is: Address your inbox placement.

Follow these guidelines to improve email deliverability:

  1. Use email authentication: Implement protocols such as SPF, DKIM, and DMARC on your domain.
  2. Use the double opt-in method: Confirm subscriptions to ensure recipients want your emails.
  3. Use email validation: Remove invalid, unengaged, or bounced email addresses.
  4. Follow email design best practices: Ensure there’s a good text-to-image ratio.
  5. Segment your audience: Group subscribers accurately so you can send targeted emails.
  6. Warm up your IP address: If sending from a new IP, start with low volume and gradually increase it.
  7. Feedback Loops: Sign up for feedback loops with major ISPs to get notified when recipients mark your email as spam.
  8. Easy unsubscribes: Provide a one-click unsubscribe link; it will help reduce spam complaints.
  9. Reputed email platform: Choose an ESP with a good deliverability record, such as Campaign Refinery.

Campaign Refinery: The Best Way to Boost Email Engagement Metrics

Campaign Refinery offers the best deliverability in the email industry, but there’s a lot more to us.

We offer powerful, simple, and intuitive tools that seasoned email veterans love, such as:

  • Automated list-cleaner: No need to pay for third-party email validation, our automated list-cleaner will find all the problematic entries on your contact list.
  • Turbo Gamification: This feature has clocked open rates of 76.37% and a click rate of 72.76% for previous campaigns. It’s a shortcut to high email engagement!
  • Visual automation builder: Creating complex email workflows is simplified with our flexible automation designer.
  • Evergreen Flash Sales: Entice your readers to engage with your emails by using FOMO.
  • Template library: If you’re feeling uninspired, check out our rich template library.
  • Powerful segmentation: With our segmentation tools, you can organize and target a wide range of segments with ease.

With Campaign Refinery, you can unlock superior email marketing performance. Apply here to become a customer!

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