Email List Cleaning: Complete 5-Step Guide to Boost Deliverability

In today’s digital era, email list cleaning is a necessary part of email marketing. Statistics reveal that almost half of all emails sent in recent years were spam. This revelation underlines the significance of maintaining a clean email list. 

In this blog post, we’ll reveal a 5-step guide to cleaning your email list. You’ll learn why email hygiene is important.

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Why Email List Hygiene Is Necessary

A clean email list is necessary to boost deliverability and improve customer relationships. It provides more accurate campaign metrics, maximizes cost, and protects the sender’s reputation.

Below are the reasons you should clean your email list:

Improved Sender Reputation and Deliverability

A clean email list is the basis of a good sender reputation. Deleting invalid email addresses and unresponsive subscribers reduces bounce rates and spam complaints.  

This action signals the email service providers (ESPs) that you provide valuable content. It also labels you as a responsible sender.

Also, a clean email list boosts email deliverability. Although it doesn’t guarantee 100% email delivery, it makes a huge difference. Additionally, it improves engagement and higher email marketing open rates.

Stronger Customer Relationships

A clean email list allows you to channel your energy into an audience hungry for what you have to offer. You’re more likely to provide value with each message sent to active subscribers to boost your brand’s visibility. Moreover, you’ll have satisfied customers who appreciate the relevant content they receive.

But when uninterested subscribers keep receiving targeted emails, you waste resources. Still, you risk your emails ending up in a spam folder. Loyal subscribers might not see messages in such folders. This situation can damage your sender’s reputation.

More Accurate Campaign Metrics

When inactive followers litter your list, it can mess up your email marketing KPIs. These distorted key performance indicators (KPIs) make your campaign’s performance unclear.

For example, many unengaged subscribers will affect your open and click-through rates. But by decluttering your email list, you refine your engagement metrics.

These refined metrics reflect the true data of the interested audience. As a result, email marketers make more informed decisions about their strategies.

Reduced Marketing

In email marketing, various email providers charge per number of subscribers. They also consider the volume of emails sent. As a result, every unengaged subscriber costs money without providing any ROI.

For example, suppose you’re paying for an email service for 100,000 subscribers. If only 60% are active, it means 40% of your budget is a waste.

But, with a clean list, you’re spending your resources on active subscribers. These subscribers are more likely to convert.

Step 1: Identify and Suppress Invalid Addresses

If you’re running a business as an email marketer, invalid addresses in your email list use up your budget. These invalid addresses, often due to typos, lead to a waste of resources.  

However, you earn the most of your money by identifying and eliminating them. Here’s how to go about it: 

Handling Hard Bounces

The first step in email list cleaning is removing fake email addresses. Hard bounces are the first on the list. A hard bounce occurs when a sender’s email doesn’t deliver to the recipient’s address.

It results from an invalid recipient’s address due to a misspelled domain. A closed email account or a nonexistent email address is also invalid. This phenomenon wastes resources and harms your sender’s reputation. Moreover, a high hard bounce rate can cause ESPs to block or mark your emails as spam.

Below are ways to handle hard bounces:

1. Use email marketing platforms or email cleaning services to remove email addresses that generate hard bounces. These platforms include Kit, Klaviyo, Omnisend and others. They offer an automatic system feature.
2. You can also use email list cleaners to keep your email list clean. The best email list cleaning services include Mailercheck, Zerobounce, and EmailListVerify.
3. Always review your hard bounce report to identify any pattern that needs addressing. Such issues might be due to how you collect addresses from domains.
4. Enforce welcome emails and the double opt-in strategy for new subscribers to manage fake and inactive addresses. These double opt-ins provide super helpful real-time email verification.

The best policy for hard bounces is the “one strike and you’re out” policy. Ensure you immediately remove an email address that produces a hard bounce before sending emails again. Some email verification services help with this.

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Managing Soft Bounces

A soft bounce results from undeliverable emails due to a temporary glitch. An email fails to send if the recipient has a full inbox, messages are too large, or the server is down. Additionally, soft bounces are most times temporary, unlike hard bounces. Recipients can still receive their message on another trial.

But you shouldn’t ignore them, as they can become hard bounces if they persist. Below are steps to manage soft bounces:

1. Track soft bounces with email marketing platforms.
2. Set up a limit to manage soft bounces. For instance, you might remove email addresses if they soft bounce three times in a row. 
3. Reduce the number and consistency at which you send emails to addresses that soft bounce. 
4. Pay attention to patterns of soft bounces for B2B email lists. You may need to contact your receiver to notify them.

Managing email bounces is a crucial first step in cleaning email lists. This process aids deliverability and ensures that real active inboxes receive your emails.

Step 2: Segment Unengaged Subscribers

Unengaged subscribers litter your email list and need you to address them. First, email segmentation involves grouping certain contacts into sections based on defined criteria.

By dividing these subscribers, you can handle unengaged subscribers. Here are ways to deal with such:

Defining Engagement Criteria

Set your rule for what defines an engaged subscriber. This step helps you deal with followers who are reachable but unresponsive, especially in cold email outreach. 

Below are factors to consider:

1. How often do subscribers open your emails?
2. Do they click on links within the emails?
3. Do they visit your website after opening an email?
4. Have they taken any steps like registering for an event or buying your product?

Generally, you can consider a follower unengaged after 3-6 months of inactivity. However, criteria differ across brands and industries. So, ensure yours aligns with your brand and specific situation.

For instance, a seasonal business might consider a longer engagement window. But, a fast-paced organization might thrive better in a shorter time frame.

Additionally, engagement is more than email metrics. Consider incorporating data from other reference points. Such touchpoints include website visits or customer service interactions. This process will help you get a more comprehensive view of your email engagement metrics. 

Creating Unengaged Segments

After defining your email engagement standard, the next process is to separate unengaged subscribers. Segmenting these dormant followers makes it easier to follow up with engagement email campaigns. Also, you can remove them from your bulk list if you want. 

Below are ways to create unengaged segments:

1. Use segmentation tools from your email marketing platform to group your unengaged subscribers. Section them based on your criteria. For instance, you might create a group for followers who have been inactive in the last 3 or 6 months.
2. Create several sections based on different levels of unresponsiveness. For instance, you can create groups for 3-6 months, 6-12 months, and more than a year of inactivity.
3. Consider the follower’s history with your organization. An active audience who takes a break might not act like followers who have never been active.
4. Give new subscribers enough time to engage before judging them as inactive. 
5. Update these segments always, as engagement status can change with time.

By sectioning your unengaged subscribers, you can follow a more specific approach. You should base this approach on different levels of disengagement. 

Remember, the goal is to identify disengagement patterns. Then, you create opportunities to re-engage these subscribers before later removal. As a result, with these personalized approaches, you’re likely to revive lost interest.

Step 3: Launch Re-engagement Campaigns

After isolating unengaged followers, winning them back is your next assignment. A re-engagement campaign involves emails you send to unengaged and inactive contacts to get them active again. 

Below are ways to carry out re-engagement campaigns:

Crafting Win-back Emails

Win-back emails can spark interest in your long-lost subscribers. To grab your audience’s attention, ensure they stand out from your regular messages.

Below are factors you should consider:

1. Use attention-grabbing headlines to get their attention. For instance, include their name in subject lines. Also, using humor and emotional words like “Where have you been?” or “We miss you” can spark curiosity.
2. Share recent news and valuable content to remind your audience what they’ve missed.
3. Make an offer they can hardly resist. For instance, a discount on a product.
4. Request for feedback to hear from them.
5. Give them options for preferences. Followers might prefer less frequent emails, lighter content, or different content.

Remember, win-back emails aim to restart a meaningful relationship with your audience. So, ensure your emails are compelling enough.

Implementing Sunset Flows

If win-back emails don’t work, apply sunset flows. This step is the next line of action in your re-engagement campaigns. It involves sending goodbye emails before removing inactive subscribers.

Below are ways to craft a sunset flow:

• The final effort to re-engage: This message stresses the advantage of staying subscribed. It includes the option to choose preferences.
• Warning of removal: a call-to-action email warning subscribers about the risk of removal  
• Goodbye email: A final message noting their removal. However, you offer them an opportunity to resubscribe in the future if they wish.

Sunset flows are more than list hygiene. They’re about respecting followers’ right to choose how they communicate with your brand. This approach fosters improved brand perception while deleting subscribers from your list.

Step 4: Remove Unresponsive Subscribers

Removing unresponsive subscribers becomes a crucial step if winning them back fails. Below are what you should know:

Deletion vs. Suppression

Deletion removes an email address from your record. This straightforward method eliminates using resources on inactive followers. But, it does mean that you no longer have access to all data related to the subscriber. This data could be useful in the future.

On the other hand, suppression keeps the email addresses in your record. But, it denies them access to future messages. With this approach, you won’t make the mistake of re-adding the address to your active list in the future.

Several email marketing platforms provide suppression list features. Still, choosing between deletion and suppression should depend on your specific situation:

• Deletion manages cost if you’re paying for your platform based on subscribers’ number. 
• Consider suppression if many of your old customers return after long inactivity. It’s also useful if you value historical data for evaluation. 
• Deletion is better if your organization has strict policies on data retention. 

Creating Exclusion Segments

Creating exclusion sections can help manage passive followers without removing them. This step involves creating a group of inactive subscribers. Then exclude them from frequent email campaigns.

Here’s how to go about this step:

1. Create a section based on your engagement criteria. 
2. When setting up an email campaign, exclude the segment from the recipient’s list.
3. Always track this segment for subscribers who might change status with time.
4. Consider creating separate email campaigns for this group. The target is to re-activate unresponsive subscribers.  

Exclusion segments allow you to manage communication with subscribers. This step minimizes communication with unresponsive subscribers without deleting them. It also helps with adding them back if they renew their interest.

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Step 5: Maintain Ongoing List Hygiene

Sustaining a hygienic email list involves keeping it clean. It means prioritizing engaged audiences and implementing advanced segments. Also, ensure you simplify unsubscribe processes and check performance. Below are the steps to take:

Prioritize Engaged Subscribers

Sustaining a healthy email list isn’t a one-time job; it’s a continuous process. Prioritizing engaged subscribers is one effective way to achieve a clean list.

To focus on these followers, begin by designing an engagement scoring system.

You should consider the following to build such a system:

• Email frequency and recency of email opens and clicks.
• Website visits.
• Purchase history.
• Social media interactions. 

With this scoring system, you can segment your followers. Ensure to group them based on their engagement levels. For instance, “Highly Engaged,” “Moderately Engaged,” and “Minimally Engaged.”

Also, consider crafting your email content based on this engagement status. For example, active subscribers can receive newsletters, promotional emails, and product announcements. While less active followers receive major announcements and re-engagement emails.

Also, active subscribers might value regular communication. But, less active audiences might do well with fewer, more specific emails. Furthermore, practice email cadence to guide your timing and email structure. 

Implement Advanced Segmentation

After activity-based segmentation, advanced grouping helps you to create relevant email campaigns. These personalized messages have a higher chance of keeping subscribers always interested.

Below are factors to consider while grouping:

• Demographics: Age, gender, location, occupation, etc.
• Purchase history: what products did your audience buy, when last did they buy, and how much they spent?
• Browse pattern: the type of product and content they show interest in on your website.
• Email preferences: the type of emails they always open and respond to.
• Customer lifecycle stage: are they new subscribers, first-time buyers, or lapsed customers?

Use the above groups to personalize your messages to subscribers. For instance, you can recommend separate products to different age groups. 

Also, craft content based on audiences’ browsing behavior and email choices. The more relevant your messages are to your audience, the more they stay interested.

Simplify Unsubscribe Process

Helping people unsubscribe with ease from your emails maintains a healthy list. It’s one of the steps in email list cleaning that lightens your workload. Here, you don’t have to clean manually or use an email list cleaner. Subscribers do the job themselves.

This process offers many advantages, including:

• Reducing spam traps and complaints: Frustrated subscribers can flag your emails with spam filters.
• Improves sender reputation: ESPs favor senders who consider audience preferences. 
• Maintains brand’s integrity: Subscribers who can leave are happier.

You can include an unsubscribe link in your content. But, providing an “opt-down” option allows subscribers to have more control.

Continuous Performance Monitoring 

Continuous performance monitoring is the final step to having clean email lists.

First, look for trends over time. Are there particular emails with higher conversion rates? Are there more active audience groups? Also, check for clicks and on-site behavior. Use inbox placement testing to ensure your emails reach the right inbox, not diverted by spam filters. 

Additionally, pay attention to recent sign-ups from new subscribers. They’re usually active. Send welcome emails and engage them. Then, watch out for how long it takes them to become inactive.

Finally, use these insights to improve your email marketing strategy. Remember, performance tracking aims to know numbers. It provides insights to improve your email marketing approach.

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Conclusion

You can boost email deliverability by identifying and removing fake addresses. You should also segment inactive subscribers. Additionally, re-engagement campaigns and performance monitoring are key elements for maintaining a clean email list.

As we’ve established earlier, a clean email list remains fundamental to successful email marketing. With a healthy list, you foster positive customer relationships. You also promote a good sender reputation and improve your email ROI.

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Next Steps: What Now?

Now that you’ve learned how to clean your email list, here are the next steps to take:

1. Check your email list for invalid addresses and remove them.
2. Create groups for unengaged subscribers and also for engaged subscribers based on engagement levels. 
3. Write marketing emails to sustain subscribers’ interest and launch re-engagement campaigns. Don’t forget to use catchy headlines.
4. Personalize your emails to connect to your audience’s needs.
5. Continuously monitor performance to maintain a clean list.

Further Reading & Useful Resources

Find below useful resources that can help you with email marketing:

• What Is Marketing? Learn what marketing is, its purpose, and best practices.
• What Is Email Marketing? Find out how email marketing works to sharpen your skills.
• How to Build an Email List: Step-by-step tips to grow a targeted, high-quality email subscriber base.
• What Is the Best Time to Send Marketing Emails: Discover the optimal times to reach your audience and boost engagement.
• What Is Digital Marketing? Discover the best strategies for business growth.
• What is a good conversion rate? Know what conversion rate means and how it works.
• Learn About E-Commerce Email Marketing: Helpful tips for online stores to connect to customers.
• Find out How to create a website and empower your digital presence.