How to Run a Re-Engagement Campaign That Revives Your Email List

Run a re-engagement campaign to bring back dead subscribers and improve inbox placement.

Why Re-Engagement Campaigns Matter for eCommerce Brands

A re-engagement campaign can reduce your Klaviyo bill, improve inbox placement, and bring dormant subscribers back to life.

Inactive subscribers pull down open rates and make inbox providers view your emails as lower quality. Over time, this lowers your deliverability score. Once that score drops, even your best customers are less likely to see your emails.

Many eCommerce brands continue emailing their full list without realizing up to 40% of it is no longer engaging. These subscribers receive emails, don’t open them, and signal to inbox providers that your emails aren’t worth prioritizing.

This costs money. It also limits performance.

What a Re-Engagement Campaign Looks Like

A re-engagement campaign is a short email and SMS sequence sent to inactive subscribers. These are people who haven’t opened an email in the last 60 – 90 days.

The goal is simple: get them to open one message. That one open reclassifies them as active, which removes them from exclusion segments and brings them back into regular campaigns.

This approach also prevents inbox providers from penalizing you for low engagement. If someone does not re-engage after several attempts, they should be removed from your list.

Focus on Open Rates, Not Revenue

A re-engagement campaign is measured by open rate. This metric is the fastest way to improve your sender reputation.

Sales can come later. The priority here is whether subscribers are still responsive to your brand.

If someone opens a single email, they’re warm again. If they don’t respond to a full sequence, it’s time to clean your list.

Why People Become “Unengaged Subscribers”

  • They haven’t received emails from you recently (you didn’t send any)
  • Your emails go to the spam or promotions tabs due to poor deliverability
  • Subject lines fail to stand out
  • The send times don’t match their schedule

Some subscribers will naturally churn. Others may just need a reminder that your brand still exists.

Use Customer Psychology to Get Seen Again

To revive engagement, take advantage of two basic psychological concepts:

  1. Pattern interruption
    Subscribers who are used to glossy HTML emails will notice a plain text email with a casual subject line. A different format can make people pause and pay attention.
  2. Curiosity
    Subject lines like “Hey {FirstName}…” or “Quick question for you” increase the likelihood of an open. Avoid spammy or exaggerated language that can trigger filters.

Plain formatting also helps deliverability. Fewer images reduce the chance of landing in promotions or getting clipped.

Example: Saving $600 Per Month With a Simple Campaign

A technology brand using Klaviyo had over 250,000 subscribers. More than 100,000 had not opened an email in over 90 days despite regular sending.

Shawfire Media created a re-engagement campaign using 7 emails and 4 SMS messages. Messages were short, used plain formatting, and included personalized subject lines.

52,000 subscribers re-engaged. The remaining 48,000 were removed from the list. This reduced their monthly email cost by over $600 and improved overall open rates by 24%

Steps to Run a Re-Engagement Campaign

1. Build the Segment

Create a segment of subscribers who haven’t opened in the past 60 – 90 days. Adjust this based on how often you send campaigns.

Exclude high-value customers or recent purchasers who might still be engaged.

2. Use a Short Message Sequence

Send 5–10 total touchpoints across email and SMS over a 1-2 week period. Space them out to avoid overwhelming the subscriber, but stay consistent enough to stay visible. A typical sequence could look like this:

  • Email 1: Plain-text check-in that feels personal and informal
  • SMS 1: Light-touch message with their first name and a subtle prompt
  • Email 2: Short email with a curiosity-driven subject line to grab attention
  • Email 3: Clear message asking if they still want to hear from you
  • Email 4–6 (optional): Test alternative subject lines, angles, or resend to non-openers
  • SMS 2: Final reminder before they’re removed from the list

Each message should be easy to skim, low on design, and focused on re-engagement – not sales. The goal is to trigger an open and reclassify them as active.

3. Limit Design and Maximize Deliverability

Use minimal HTML. Stick to short copy, a clear CTA, and no more than one image. Consider plain text for at least one of the emails.

4. Track Only Open Rates

If someone opens a single message, they will be automatically removed from your “unengaged” exclusion segment and added back to your main list.

5. Remove Unresponsive Subscribers

If no activity occurs after the sequence, clean your list. Suppressing inactive subscribers reduces costs and improves performance.

Mistakes to Avoid

  • Measuring clicks or revenue instead of open rates
    Open rate is the only metric that matters in a re-engagement campaign. Everything else comes later.
  • Using branded templates that land in spam
    Stick to minimal formatting. Fancy design can hurt deliverability during re-engagement efforts.
  • Sending too many re-engagement campaigns too often
    Subscribers need space. Re-engage quarterly – not weekly.
  • Avoiding list cleaning entirely
    The longer you leave disengaged subscribers on your list, the worse your deliverability gets. Even great content won’t perform if it never lands in the inbox.

Focus on long-term list health over vanity metrics.

Don’t Be Too Quick to Purge Your List

Purging your list too quickly can cost more than it saves.

Let’s say you have 10,000 inactive subscribers. They’re costing around $150 per month to keep on your email platform. On paper, it seems like an obvious cut.

But if just 10% re-engage during a seasonal or high-performing campaign, the resulting profit could easily exceed that monthly cost. These contacts may not open every message, but they might still convert when the timing or offer is right.

Give your re-engagement campaigns time to work. Let people surprise you.
Balance short-term cost savings with long-term earning potential.

Key Takeaways for Re-Engagement Campaigns

  • A re-engagement campaign targets inactive subscribers with a short message sequence
  • Open rates are the key metric, not revenue
  • Plain text and SMS help break old patterns and boost deliverability
  • Removing non-responders reduces cost and improves inbox placement
  • Use curiosity and simplicity to drive attention

Need help executing this?

Shawfire Media builds custom re-engagement campaigns for fast-moving eCommerce brands.

We handle segmentation, messaging, and cleanup—so your list performs at its best. [Contact us here.]