Why a 25% Open Rate Is Misleading Without Context

That 25% open rate on your reactivation report? It might be significantly overstating how many past customers actually saw your message. Before you celebrate — or panic — you need to understand what's really behind that number.

Since Apple introduced Mail Privacy Protection (MPP), the "open" has become one of the least trustworthy metrics in email marketing. Apple's mail app pre-loads tracking pixels for every user, whether or not they actually read the email. With Apple Mail accounting for roughly 46% of email clients, researchers estimate MPP inflates open rates by up to 18 percentage points.

That means a reported 25% open rate could reflect a true open rate as low as 7–17%. The gap matters most in reactivation work, where you're trying to determine whether dormant customers still remember your business. As Klaviyo's benchmark team puts it, Apple "opens" each email for any user with MPP enabled, whether or not they actually open it.

This is why leading platforms now steer marketers away from opens as a performance measure. Salesforce recommends shifting focus to click-through rates and click-to-open rates, since users can block tracking pixels entirely. MailerLite's analysis agrees, calling click rate "the most accurate indicator of email newsletter engagement."

For service businesses running win-back campaigns, the distortion compounds:

• A 25% open rate looks "healthy" on paper while actual engagement may be far lower
• ROI calculations built on opens overstate reach and understate cost-per-genuine-engagement
• Decisions about which segments to keep or retire get made on inflated data
• Reactivation revenue gets misattributed to campaigns that never truly connected

The fix is to evaluate opens alongside downstream metrics — clicks, replies, and booked appointments. MoEngage's study of 17+ billion emails recommends pairing open rates with click-to-open and conversion rates to assess true campaign value. In practice, a reply or a booked call is worth more than a thousand phantom opens.

This is exactly why CallMyCustomers treats open rates as a directional signal, not a verdict, in reactivation campaigns. Because every campaign mixes calls, texts, and emails — with replies routed straight into your booking process — the metric that matters is booked work, not inbox ghosts. A past customer who picks up the phone is worth infinitely more than one whose mail app quietly loaded a pixel.

How Industry Benchmarks Change What 'Good' Means for Service Businesses

A 25% open rate means something completely different depending on what kind of service business you run — and benchmarking against the wrong peer group can lead you to fix problems you don't have, or miss the ones you do.

The headline numbers vary widely by source. MailerLite's 2025 data puts the overall average at 43.46% across 3.6 million campaigns, while Klaviyo's benchmarks from 205,000+ brands report a 31% campaign average, and MoEngage's analysis of 17+ billion emails lands at 28.6%. Against any of these, 25% sits below average — but the industry breakdown tells a more useful story.

For service businesses, the relevant peer comparisons look like this:

• Professional and business services: MailerLite shows consulting at 45.96% and business/finance at 43.34%, while Mailchimp reports business and finance at 31.35% — a wide spread that makes 25% look weak against consultants but closer to average against Mailchimp's broader business category.
• Retail and repeat-cycle businesses: Klaviyo's campaign data shows mass merchants at 28.7% — the lowest of its industry range — while MoEngage puts retail and ecommerce at 32.59%.
• Media and entertainment: MoEngage reports 25.78%, meaning a 25% open rate is essentially right at the industry norm here.
• Home services, wellness, and automotive: None of the major benchmark studies break these out separately, so operators in these sectors are often benchmarking against ecommerce-heavy data that doesn't reflect their reality.

That last point matters most. An HVAC company running seasonal reminders or an auto repair shop following up on old quotes is emailing a list of known customers — not a cold prospect list. Reactivation-focused guidance treats these audiences differently, because the relationship already exists.

This is exactly why CallMyCustomers starts with a free list review before any fee: rather than judging a 25% open rate against an arbitrary cross-industry number, the question becomes what your specific list — segmented by recency, old quotes, and lapsed memberships — can actually produce, and what that means for your outreach cost per booked appointment.

One more caveat before you panic: Apple's Mail Privacy Protection inflates open rates by up to 18 percentage points across roughly 46% of email clients. A competitor's "40% open rate" may represent far less genuine engagement than it appears — which is why click-based metrics are the better yardstick for real ROI.

What Metrics Actually Predict Reactivation ROI in Mixed-Channel Outreach

If your open rate says 25% but Apple's Mail Privacy Protection may be inflating it by up to 18 percentage points, you're not measuring engagement — you're measuring noise. That's why the metrics that actually predict whether a reactivation campaign will produce booked appointments live further down the funnel, in clicks and conversions.

Salesforce puts it plainly: with users able to block tracking pixels, open rates "may no longer provide a precise measure of actual opens," which is why the platform recommends shifting focus to click-through rates and CTOR. MailerLite's benchmark team agrees, noting that click rate is currently the most accurate indicator of email engagement because it doesn't depend on open tracking at all.

The numbers back this up. Average click rates hover between 2.09% and 2.62% in MailerLite and Mailchimp data, while MoEngage's study of 17+ billion emails found an average conversion rate of 12.04% — a far more meaningful signal for revenue than any open count.

The most predictive factor, though, isn't which metric you track — it's what kind of email you send. Klaviyo's benchmarks from 205,000+ brands show automated flows generate 3x higher click rates and 13x higher placed order rates than one-off campaigns, producing roughly 41% of email revenue from just 5.3% of sends. MoEngage found the same pattern: behavior-based emails reach up to 42.36% opens versus 14.5%–26.9% for broadcasts.

For a service business running reactivation outreach, that distinction matters when estimating revenue impact:

• Click rate reveals genuine interest — someone took an action, not just loaded an image.
• Placed order rate — 2.11% for flows vs. 0.16% for campaigns in Klaviyo data — maps directly to booked work.
• Unsubscribe rate (0.22% average per MailerLite) signals whether your list is worth the outreach cost.
• Behavior-triggered timing — old quotes, renewals, seasonal cycles — outperforms batch-and-blast by a wide margin.

This is why CallMyCustomers evaluates open rates as one directional signal within a fuller cost picture, weighting replies, clicks, and booked appointments as the metrics that tie outreach spend to repeat revenue. When a campaign is judged on what customers actually do, the ROI math gets honest fast.

How CallMyCustomers Uses This Data to Optimize Campaign Cost and Response

A 25% open rate on a reactivation email tells you less than most business owners think. Once you know that Apple's Mail Privacy Protection can inflate reported opens by up to 18 percentage points, a "healthy" number might actually mask a true open rate of just 7%–17%. That gap matters enormously when you're calculating what each booked job actually costs.

At CallMyCustomers, we treat open rates as a directional signal, never the verdict. The benchmarks make clear why: Klaviyo's data from 205,000+ brands shows automated flows generate 3x higher click rates and 13x higher placed order rates than one-off campaigns. So our reactivation workflows prioritize behavior-triggered outreach — old quotes, expiring memberships, missed appointments — over broadcast blasts, because that's where genuine engagement lives.

Segmentation does the heavy lifting before a single message goes out. Every list gets reviewed by recency — 30 days, 6 months, 12+ months — plus old quotes that never became jobs and happy customers who could refer. This isn't just about relevance; it's about cost. List-hygiene guidance points out that removing chronically unengaged contacts cuts subscription costs, and the same logic applies to outreach minutes: why spend budget on contacts who've ignored every touch?

How the benchmarks shape campaign decisions:

• Prioritize flows over blasts — behavior-based emails achieve up to 42.36% opens versus 14.5%–26.9% for broadcasts, per MoEngage's analysis of 17+ billion emails.
• Lean on personalization — MoEngage found it improves open rates by 20–40%, which is why every script references the customer's actual history with the business.
• Judge success by clicks and replies, not opens — MailerLite's benchmark study calls click rate "the most accurate indicator" since it doesn't rely on tracking pixels.
• Watch unsubscribe trends — MailerLite reports rates doubled from 0.08% to 0.22% after Gmail's unsubscribe changes, so we monitor opt-outs as a hygiene signal.

Channel mix completes the picture. Email benchmarks cover email only, but reactivation runs across calls, texts, and email together — with the full mix covered in one quote, so per-channel math never hides the true cost. When a customer hasn't opened anything in months, a phone call from a real person often outperforms any subject line.

The result is a simpler, more honest ROI picture: fewer wasted sends, more replies routed straight into your booking process, and a cost per booked job that reflects real engagement — not inflated metrics.

Get a free list review and see what your past customers, old quotes, and inactive members could produce before you spend a dollar.