How a Four-Email Campaign Drove New Revenue Without Acquiring New Customers
For over a century, Independent Electric (IE) has built a reputation for expert motor repair and rewind services. Facilities managers across the Midwest knew exactly who to call when a critical motor failed. But when IE expanded into predictive and preventive maintenance services, most of their existing customers didn’t know about it.
This is a common problem that faces companies with multiple service offerings: current customers often don’t know you can solve additional problems they’re facing. The path to growing sales (and thus growing relationships) with those who already know and trust you is often much faster and easier than acquiring net new customers.
The Challenge
IE had invested in new reliability services representing a strategic shift from reactive repair to proactive partnership. Their target audience was the existing database of current motor repair customers. The marketing challenge was introducing a new service line without sounding like a sales pitch to established relationships.
Like most industrial companies, IE’s sales tracking was relationship-based. Calls came through a general line, deals were often closed on production floors, and perfect digital attribution hadn’t been a priority and likely wouldn’t be possible. But we wanted to test the effectiveness of an email campaign to provide support for an already busy sales and marketing team.
Strategy and Execution
We structured the campaign as a new service announcement with personalized follow-up from experts at IE. The campaign included four emails over two weeks, launched in January, which is the time of year when customers are typically reviewing their annual maintenance budgets.
We wrote the subject lines to feel like personal outreach, not marketing automation. Each email added a layer of context, taking the audience from awareness to consideration without pressure. The sequence held strong engagement through the final send.
Every message led with customer outcomes over company announcements, centering on what real-time visibility and proactive protection mean for a facility manager running critical equipment.
The Results
Website traffic surged 280% during the campaign window. The reliability services page specifically saw 307% growth. The timing correlation between launch and that specific page’s spike tells the story: the emails drove awareness and sent customers to learn more.
Beyond what analytics could capture, IE’s team reported:
This is how B2B industrial results typically work. Clean email-to-revenue attribution is rare. Awareness campaigns create conditions for sales conversations that wouldn’t have happened otherwise, and IE’s results confirm the approach worked.
Why This Works (And Why Most Companies Don’t Do It)
Most companies with multiple service lines operate under the assumption that their customers know what they offer. They usually don’t. Your customers know you for what they’ve purchased, not for everything you provide.
The usual objections get in the way:
The Bottom Line
IE’s story confirmed our hypothesis: if your customers don’t know everything you offer, then closing that knowledge gap will drive revenue.
Four emails drove 280% more website traffic. They opened sales conversations that wouldn’t have happened otherwise, and IE closed 2025 with a record revenue year. They’re now applying the same approach to a second service line.
The low-hanging fruit is sitting in your database right now. The question is whether you’ll invest a few hours to reach for it.
Want to discover the hidden revenue in your customer base?
GBG specializes in helping industrial and manufacturing companies identify service awareness gaps and execute campaigns that turn existing customers into multi-service customers. Let’s talk about what your customers don’t know yet.
Connect with a GBG expert today!
Share this article with your network.
