An email can reach many people and still accomplish very little.

Maybe thousands opened it. Maybe hundreds clicked. But what happened after that?

Did anyone buy, book, or inquire? If not, the campaign may not have achieved what it was meant to do. 

That’s the question worth asking when measuring an email marketing campaign. Instead of focusing on one number, I think it’s more useful to look at the campaign as a whole and see whether it contributed to the business goal.

What Should an Email Marketing Campaign Measure?

There are several metrics that can help show how a campaign is performing.

Metric	What it can tell you
Open rate	How many recipients opened the email
Click-through rate (CTR)	How many recipients clicked a link or call to action
Conversion rate	How many people completed the desired action
Unsubscribe rate	How many people left the email list
Revenue or leads	Whether the campaign generated a business result
ROI	Whether the results justified the investment

These numbers answer different questions, so one metric shouldn’t be viewed on its own.

A business promoting a product, for example, may care more about purchases than opens. A newsletter may have a different goal, such as getting readers to visit an article or stay engaged with the brand.

Is Open Rate Enough?

Open rate can be useful. While it can show whether people are opening the email, it doesn’t tell you what they did afterward.

This is also reflected in how marketers measure campaigns.

Based on a survey of email marketing professionals, CTR and conversion rate were commonly used to evaluate campaign success. These metrics were often considered alongside open rates.

That makes sense.

Someone opening an email is a start. What happens after that can be much more important.

Are People Clicking?

Let’s say a hotel company sends an email introducing a new service.

The subject line gets people to open the email. However, very few click the button to learn more.

That tells us something.

The subject line may have attracted attention. But the rest of the campaign may not have given people enough reason to take the next step.

There are several things worth checking:

• Is the offer clear?
• Is the email relevant to the audience?
• Is the call to action easy to find?
• Does the content explain why someone should click?
• Is the link taking people to the right page?

This is why I wouldn’t judge a campaign based on open rate alone.

What Happens After the Click?

This is where businesses need to look beyond email metrics.

A click is useful, but what happens next?

For example:

Campaign goal	What to look at
Sell a product	Purchases
Generate leads	Form submissions or inquiries
Get bookings	Completed bookings
Promote an event	Registrations
Share content	Article visits or downloads
Re-engage customers	Repeat purchases or interactions

The important thing is to connect the email campaign to the action the business actually wants.

If the goal is to generate bookings, 500 clicks don’t mean much if nobody books.

If the goal is to sell a product, a high open rate doesn’t necessarily matter if those opens don’t lead to purchases.

What About Your Email List?

The campaign itself is only one part of email marketing. There’s also the audience receiving those emails.

An email list is an asset. However, having a large list doesn’t automatically make it valuable. A smaller list with active subscribers can be more useful.

That’s why it helps to pay attention to the quality of the list.

Some signs worth watching include:

• People regularly opening emails
• People clicking on relevant content
• Subscribers staying on the list
• Customers responding to offers
• Leads coming from email
• Repeat purchases from existing customers

The goal isn’t just to collect more email addresses. It’s to build an audience that has a reason to stay connected.

Can Automation Improve an Email Marketing Campaign?

Automation can send an email based on something a customer or subscriber does. Instead of sending every message manually, businesses can create a series of emails that respond to specific actions.

For example:

Action	Possible automated email
Someone joins the list	Welcome email
Someone downloads a resource	Follow-up email
Someone makes a purchase	Thank-you email
Someone abandons a cart	Reminder email
Someone hasn’t engaged for a while	Re-engagement email

The growing interest in marketing automation is hard to ignore. The global market is expected to reach $15.6 billion by 2030. That’s a projected 15.3% annual growth rate from 2025 to 2030.

This data shows that automation is becoming a bigger part of modern marketing. And email is one area where businesses can put it to practical use.

So, Is Your Email Marketing Campaign Working?

I don’t think there’s one number that can answer this question.

A high open rate doesn’t always mean a campaign was effective. A high CTR doesn’t guarantee sales either. The better approach is to connect the numbers to the original goal.

This is also where email marketing fits into the bigger picture of digital marketing. Email is just one channel, so it helps to look at how it works with other channels too. 

Before sending a campaign, ask:

• What do we want people to do?
• Who is this email for?
• What action should they take?
• Which metric will show whether they took that action?
• What will we change if the campaign doesn’t perform as expected?

After the campaign, look at the results and compare them with that goal.

If people didn’t open the email

The issue may be the subject line, timing, audience, or deliverability.

If they opened but didn’t click

The content, offer, or call to action may need attention.

If they clicked but didn’t convert

The problem may be outside the email itself. The landing page, booking process, checkout, or offer could be affecting the final result.

Let Me Help

Email marketing gives businesses plenty of data. The challenge is knowing which numbers matter.

A good campaign report should answer one practical question:

What did people do after receiving the email?

That answer can show what worked, what didn’t, and what to change next time. 

If you’re not sure what your email numbers are telling you, let me help you make sense of them.