There's a version of email marketing that goes like this: write one email, send it to the entire list, hope for the best. It's quick. It's easy. And it produces results that are consistently, predictably mediocre.
The average B2B email campaign gets an open rate somewhere between 15% and 25%, depending on whose benchmarks you trust. Click-through rates hover around 2% to 3%. Those numbers aren't terrible. They're just unremarkable. And they stay unremarkable because most businesses treat their entire contact list as one homogeneous audience.
It isn't. Your list contains people from different industries, different company sizes, different roles, different stages of the buying cycle. Sending all of them the same email is like a restaurant serving everyone the same dish regardless of what they ordered. Some will like it. Most won't come back.
When most people hear "segmentation," they think demographics. Split the list by job title, company size, maybe geography. It's better than nothing, but it's still surface-level.
The segmentation that actually moves results is behavioural. Not who people are, but what they've done. Who opened your last three emails? Who clicked through to your case study but didn't download it? Who visited your pricing page twice in a week? Who hasn't opened anything in six months?
These behavioural signals tell you far more about someone's likelihood to buy than their job title does. A finance director who's never opened a single email is a colder prospect than an operations manager who's clicked every link you've sent.
The best campaigns I've worked on this year were segmented on three axes: industry, engagement level, and buying stage. Industry tells you what language to use. Engagement level tells you how much attention you've earned. Buying stage tells you what to say.
Earlier this year we ran a campaign for a managed print provider. They had just over 11,000 contacts across several sectors. The original plan was a single email to the full list. Same message, same subject line, same call to action.
We split it instead. Three primary segments: legal firms, financial services, and general commercial. Same core message (print cost reduction), but different framing for each.
For legal firms, we led with compliance and document security. For financial services, we led with cost per page and audit trails. For general commercial, we led with the simple question of whether they knew what they were spending annually on print.
The results were striking. The legal segment opened at 34% and clicked at 6.2%. Financial services opened at 29% and clicked at 4.8%. General commercial opened at 22% and clicked at 2.1%. Same product. Same company. Fundamentally different response rates because the message matched the audience.
If we'd sent one generic email to all 11,000, we'd have averaged out at roughly 25% and 3%. Acceptable numbers. But the legal segment, which contained some of the highest-value prospects, would have underperformed dramatically because a generic message about "print solutions" doesn't land with a managing partner the way "document compliance" does.
Industry segmentation is the obvious split. The less obvious, more powerful split is engagement.
Your highly engaged contacts (opened last three emails, clicked at least once) don't need the same treatment as your dormant contacts (no opens in 90+ days). Sending them the same email wastes an opportunity.
Highly engaged contacts are warm. They've been paying attention. Your email to them can be more direct, more specific, and include a stronger call to action. "We've noticed you've been looking at our case studies. Fancy a ten-minute call to see if we can do the same for you?" That level of directness works when you've already built familiarity.
Dormant contacts need a different approach entirely. Something that earns the right to re-engage. A subject line that acknowledges the gap. A shorter email. A softer ask. "It's been a while. Here's one thing that's changed since we last spoke." The goal isn't conversion. It's reactivation.
The middle group, the occasional openers, needs consistent nurture. Regular, valuable content that keeps you in their peripheral vision until something changes in their business and they're ready to pay attention.
Every time I talk about segmentation, someone says: "We don't have time for that." And I understand. Writing five versions of an email instead of one takes more effort. Setting up the segments, maintaining the tags, reviewing the different performance metrics: it's all extra work.
But consider the alternative. Sending one email to 10,000 people and getting a 2% click rate gives you 200 clicks. Segmenting into five groups and getting rates between 3% and 7% might give you 400 to 500 clicks from the same list. Double the results for maybe three times the writing effort. The maths works.
And the writing effort reduces over time. Once you've built your segment templates, future campaigns are variations, not rewrites. The setup cost is front-loaded. The returns compound.
The usual sticking point isn't the writing. It's the data. Segmentation only works if your CRM actually tracks the information you're segmenting on. If you've never tagged contacts by industry, you can't segment by industry. If your email platform doesn't track engagement history, you can't segment by behaviour.
This is a setup problem, not an ongoing one. Spend a day tagging your existing contacts properly. Set up engagement tracking in your email platform. Create three or four segments that match your actual sales process. Do this once and every campaign after it gets better.
The businesses that nail email marketing aren't writing dramatically better copy than everyone else. They're sending the right message to the right people. Segmentation is how.
Martin Dugan, AA2
