Why Industry Benchmarks Matter More Than Generic Open Rate Targets

If you're judging your email campaigns against a single magic number, you're probably judging them wrong. A 35% open rate might be excellent for one business and disappointing for another — because what counts as "good" depends almost entirely on your industry.

The data makes this clear. According to Mailchimp's benchmark report, the "All Users" average open rate sits at 35.63%, but that number hides enormous variation between sectors. Non-profits average 40.04%, while e-commerce averages just 29.81%. MailerLite's 2025 data shows an even wider spread, from 30.10% in travel and transportation to 55.71% in religion — a gap of more than 25 percentage points.

For US service businesses — HVAC companies, dental clinics, auto repair shops, salons — the most relevant benchmark is Business + Finance at 31.35%. That sector is the closest proxy for service-oriented businesses in the available data, since dedicated benchmarks for trades like plumbing or HVAC don't exist. If your reactivation emails are landing at or above roughly 31%, you're performing well by industry standards — even though that number falls below the overall averages you'll see quoted elsewhere.

This is why arbitrary targets like "we need 50% opens" can mislead. A business owner might evaluate a win-back campaign as a failure because it hit 33%, when in reality it outperformed the Business + Finance benchmark. MailerLite puts it plainly: if your metrics are around or above your industry number, "you're likely doing a great job." The reverse is equally true — chasing a number that has nothing to do with your sector leads to poor decisions about campaigns that are actually working.

There's a second reason to be careful with open rates: Apple's Mail Privacy Protection inflates them. Apple Mail automatically marks emails as opened, which is why MailerLite notes that "real open rates are lower than the metrics you see in your dashboard." Both Mailchimp and MailerLite acknowledge this limitation and recommend click-through rate as a more reliable engagement measure, since it isn't dependent on tracking opens.

So when evaluating your email performance, benchmark against the right comparison points:

• Your own industry benchmark — for most service businesses, Mailchimp's Business + Finance figure of 31.35% is the closest available proxy
• Click-through rate, not opens — MailerLite's 2025 overall click rate benchmark is 2.09%, and clicks reflect genuine engagement
• Regional context — MailerLite reports US and Canada open rates at 44.49%, higher than global averages
• Your own baseline — establish where your list performs today before setting improvement targets

This is the framework we use at CallMyCustomers when reviewing email follow-ups for service businesses. Before any campaign runs, a free list review establishes what your list can realistically produce — so success is measured against benchmarks that actually apply to your business, not someone else's average.

How Apple's Mail Privacy Protection Skews Open Rates and What to Track Instead

Your 45% open rate might not be real — and the biggest email platforms will tell you so themselves. Since Apple introduced Mail Privacy Protection (MPP), every email loaded in Apple Mail gets marked as opened, whether a human ever looked at it or not.

Both major platforms openly acknowledge the distortion. MailerLite's benchmark report states plainly that "real open rates are lower than the metrics you see in your dashboard," while Mailchimp's benchmark data flags the same limitation. Since a large share of email opens now come from Apple devices, your dashboard is likely flattering you.

That's why the platforms themselves point to a different metric. MailerLite's Duncan Elder calls click rate "currently the most accurate indicator of email newsletter engagement since it's not reliant on tracking opens." A click requires a deliberate human action — someone read your message and wanted more. An MPP-triggered "open" requires nothing at all.

For service businesses running reactivation and follow-up campaigns, this distinction matters when you're estimating what a campaign can actually produce. Instead of chasing inflated open numbers, watch these signals:

• Click-through rate — MailerLite's 2025 overall benchmark is 2.09%, and Mailchimp's Business + Finance data puts the sector at 2.78%, a realistic target range for service-business outreach.
• Click-to-open rate — MailerLite reports 6.81%, useful for judging whether the people who genuinely opened your email found the offer compelling.
• Replies and bookings — for follow-up campaigns, an actual response or scheduled appointment is the metric that translates directly to revenue.

This is also why CallMyCustomers builds its email follow-ups around responses rather than vanity metrics. Because every campaign mixes calls, texts, and emails — with replies routed straight into your booking process — a customer who answers the phone or hits "reply" counts the same regardless of what Apple Mail reported.

Matt Schott, Senior Lead Gen Strategist at thunder::tech, puts it well in Mailchimp's benchmarks: "Good old-fashioned click-through rate is one of the most meaningful statistics to track," especially when layered with audience size. For a list of past customers, that layering is exactly what turns a dormant contact list into a second revenue engine.

So when you review campaign results, treat open rates as a rough directional signal — and hold clicks and booked appointments as the numbers that actually tell you whether your outreach is working.

Practical Steps to Measure and Improve Your Reactivation Email Performance

Knowing whether your reactivation emails are "good" is impossible without a yardstick — and the right yardstick is your industry's benchmark, not a generic average. Here's how to measure and improve performance in a way that actually tells you something.

Step one: establish your baseline. Before optimizing anything, compare current campaign performance against industry-specific data. According to Mailchimp's benchmark report, the Business + Finance sector averages a 31.35% open rate — a realistic proxy for service businesses like HVAC, dental clinics, and automotive repair, since no provider publishes sector-specific data for those trades. If your win-back, renewal, or post-service emails land at or above that number, you're performing well.

Step two: optimize subject lines with proven rules. Mailchimp's research identifies specific subject line characteristics that improve open rates:

• Keep subject lines to 9 words or fewer and 60 characters or fewer
• Limit punctuation to 3 marks or fewer
• Use at most 1 emoji at a time — to supplement text, never replace it

These constraints matter for reactivation campaigns especially. A subject line like "Your furnace tune-up is due — book this week" beats a cluttered alternative because it's short, specific, and gives a reason to reconnect that feels useful rather than pushy.

Step three: measure against the right regional benchmark. US & Canada open rates run at 44.49% compared to global averages, per MailerLite's 2025 benchmarks, so a US-focused list can reasonably aim higher than worldwide numbers suggest.

Step four: watch clicks, not just opens. Because Apple's Mail Privacy Protection inflates reported open rates, click-through rate is the more reliable engagement metric. MailerLite's overall click rate benchmark sits at 2.09%, and Mailchimp reports a Business + Finance click rate of 2.78% — meaningful targets for service-business campaigns.

When CallMyCustomers runs email follow-ups for clients, this is the same framework applied: measure each win-back or renewal campaign against Business + Finance benchmarks, refine subject lines before the next wave, and track clicks as the true signal. Benchmarks exist to set realistic improvement targets, as Mailchimp notes — not to make you chase a number your industry was never going to hit.

For a typical reactivation campaign running two to four weeks, that means reviewing performance after the first wave, adjusting the subject line or offer, and re-sending to non-openers. Small, benchmark-informed tweaks compound quickly — and one well-timed message is often all it takes to win a customer back.