This is the third in a 4 blog sequence all about Segmentation and making it work in Mailchimp – you can jump to the next blog by clicking here or read the previous one by clicking here.

So you’ve committed to segmenting your audience.

You’ve set up your groups.

You’ve updated your forms.

Brilliant.

But now you’re staring at your existing Mailchimp audience—the unsegmented swamp of chaos that’s been quietly growing for months (or years).

Now what?

Here’s the good news: you can retrofit segmentation. You just need a smart, strategic approach, and a healthy dose of reality.

Because here’s what doesn’t work:

1. Don’t Just Email Everyone Asking Them to Segment Themselves

It sounds logical. “Let’s send a one-off email asking people to update their preferences!”

It even feels polite.

But we’ve tested this. Repeatedly.

And the results?

Abysmal.

Why? Because no one clicks those emails. They feel like admin. There’s no urgency. And they’re asking people to do work.

So unless your list is made up entirely of highly-engaged subscribers who love filling out forms for fun… this won’t get you far.

2. Instead, Use Re-Engagement as an Excuse to Capture Segmentation

If you want someone to segment themselves, give them a reason. Something worth clicking.

Here are two strategies that actually work:

A. Offer a Lead Magnet or Access to a Webinar

• Invite them to a new free training or downloadable resource.

• Make access conditional on completing a new form that includes your segmentation fields.

• Voilà—segmentation captured.

It feels like value, not admin.

B. Use Dynamic Content in Your Email Footer

• Create a block in your footer that says something like: “Want more relevant emails? Click here to tell us what you’re into.”

• Set that block to only show if the subscriber hasn’t selected a group.

• Include it in every email.

No urgency. No bribe. Just a gentle, consistent nudge.

It won’t convert everyone,but the ones who are engaged will gradually segment themselves over time. (And let’s be honest, the zombies won’t even notice… which is fine, because they’re not clicking anything anyway.)

(not sure about dynamic content?… well the next blog post will definitely be of interest!)

3. Leverage Behavioural Segmentation If Preferences Aren’t Available

Still struggling to get responses? Start tracking clicks.

Use Mailchimp’s Customer Journeys to:

• Add tags when someone clicks a specific link (like a product, category or service).

• Segment based on campaign interaction.

• Trigger follow-ups or automations based on interest.

It’s not as clean or explicit as a group preference, but it’s infinitely better than guesswork.

4. Accept That You Won’t Segment Everyone

And that’s OK.

Segmentation is a strategy, not a test. Your goal isn’t 100% compliance, it’s better targeting, higher engagement, and cleaner data where it matters.

Focus on:

• Active, recent subscribers.

• New leads moving forward.

• Contacts who show any sign of life.

Trying to resurrect the entire database? That’s a waste of bananas.

In Summary:

• Asking everyone to segment themselves usually flops.

• Use value-driven re-engagement (downloads, webinars) to capture data.

• Include dynamic content footers to nudge non-segmented contacts.

• Track behaviour when preferences aren’t available.

• Don’t aim for perfection. Aim for progress.

Your list might be messy now, but with the right moves, you can clean it up and start sending better, more relevant emails to the people who actually want them.

And that’s where segmentation pays off.