Email Reach and ROI Are Growing — But Engagement Is Fracturing

Email marketing has never reached more people — and never been easier to ignore. The channel is simultaneously booming in scale and fracturing in engagement, and understanding that tension is the key to planning campaigns that actually get read in 2026.

Start with the reach numbers. The global email user base is projected to hit 4.6 to 4.73 billion users in 2026, and email continues to deliver roughly $36 back for every $1 spent — a return few other channels can match. It's no surprise that 94% of brands still rely on email to communicate with customers, and that 93% of consumers check their inbox daily.

But here's the contradiction sitting underneath those headline figures. According to Airship research, 79% of consumers ignore or delete marketing emails from brands they've actually subscribed to at least half the time. Saturated inboxes and information overload have driven a steady decline in open rates over the last five years, the same research notes.

Other data points complicate the picture further. Mastercard's 2026 insights report open rates edging up from 22.9% to 25.1% year over year, while separate research found that 70% of consumers unsubscribed from at least three brands in the last three months due to message overload. Even deliverability is uneven — on Gmail, only 58% of emails reach the primary inbox, with 38% filtered into promotional tabs.

So what does this mean for campaign planning? The answer isn't abandoning email — it's being smarter about how it's used:

• Segment before you send. Generic blasts feed inbox fatigue; lists segmented by recency and behavior earn measurably higher opens and clicks.
• Match the channel to the message. Email handles depth, storytelling, and cost-efficient reach, while SMS delivers 98% open rates and 90-second response times for time-sensitive offers.
• Let behavior trigger the send. Automated emails drive 37% of email-driven sales from just 2% of total volume — triggered follow-ups beat batch-and-blast.
• Combine channels. In one documented case, an SMS-plus-email group converted 126.9% better than an email-only group.

That last point matters most for service businesses built on repeat work. The customers who matter — past clients, old quotes, lapsing members — are already in your list, but a single-channel email blast into an overloaded inbox is exactly the kind of message that gets ignored. It's why CallMyCustomers blends calls, texts, and emails into a single reactivation campaign, with every message approved by the business owner before it goes out.

The data is clear: email isn't declining, but email alone is no longer enough. The winning approach treats the inbox as one pillar of a journey — not the whole trip.

Why Email Alone Isn’t Enough for Reactivation — and What Works Instead

Email may not be dying, but pinning your reactivation hopes on it alone is a costly bet. The data is clear: the businesses winning back dormant customers fastest are the ones pairing email with SMS and calls — and the gap isn't close.

The headline number comes from the Mayborn Group, whose combined SMS + email campaign group achieved a 126.9% higher conversion rate than the email-only group. That's not a marginal lift; it's the difference between a campaign that pays for itself and one that quietly underperforms. As Bloomreach puts it, the traditional email-versus-SMS debate "misses the point entirely" — customers don't compartmentalize their experiences by channel.

The reason is simple mechanics. Email is slow and crowded: only 58% of Gmail emails reach the primary inbox, and 38% get filtered into promotional tabs most people never open. SMS, by contrast, delivers a 98% open rate with 90% of messages read within minutes and an average response time of about 90 seconds. When a membership is about to lapse or a patient missed yesterday's appointment, that immediacy gap matters enormously.

The smart play is assigning each channel to what it does best:

• Email for depth and nurturing — detailed win-back offers, old-quote follow-ups with context, and storytelling that rebuilds the relationship before you ask for the booking.
• SMS and calls for immediacy — renewal reminders, missed-appointment recovery, and expiring-offer triggers where minutes count.
• Segmentation before sending — 79% of consumers ignore or delete marketing emails at least half the time, so generic blasts to a stale list are wasted spend.

For service businesses that live on repeat revenue, this maps directly onto the customer journey. An HVAC company can email a seasonal maintenance reminder with pricing details, then follow with a text when the booking window is closing. A dental clinic can email an unsold treatment plan, then call when the patient goes quiet. The channels reinforce rather than compete — notably, 97% of consumers subscribed to a brand's SMS program also engage with that brand's emails.

This is exactly how CallMyCustomers structures reactivation campaigns: email carries the substance of the offer, while texts and calls close the loop on time-sensitive triggers like renewals and no-shows. The owner approves every message before it goes out, so the mix stays on-brand and permission-based.

The decline narrative, in other words, isn't about email fading — it's about email-only strategies fading. Industry analysis frames it well: SMS and email each offer tangible benefits on their own, but together they create an omnichannel strategy that improves conversion and maximizes reach. For reactivation, the full mix isn't optional anymore. It's the baseline.

How to Reactivate Dormant Customers Using a Multi-Channel Approach

The inbox is crowded, but the opportunity isn't gone — it just requires a smarter mix. Research shows 79% of consumers ignore or delete marketing emails at least half the time, yet 97% of SMS subscribers also engage with that brand's emails. The answer isn't choosing one channel; it's sequencing them by intent.

Start by segmenting your list on recency and behavior — 30 days, six months, 12-plus months, old quotes that never converted, expiring memberships. Email carries the depth: detailed win-back nurturing, seasonal reminders, and rich offers that need room to breathe. SMS and calls handle the urgent prompts — renewal deadlines, expiring promotions, missed-appointment recovery — where 98% open rates and 90-second average response times matter. Automated, behavior-triggered sequences outperform batch blasts; one study found automated emails drive 37% of email-driven sales from just 2% of volume.

• Segment by recency and behavior before any outreach goes out
• Use email for nurturing sequences and detailed offers
• Lead with SMS or calls for time-sensitive prompts
• Build triggered automations around quotes, renewals, and post-service moments
• Approve every script and offer before a single message sends

This is the model CallMyCustomers runs for US service businesses — list review first, then a co-planned campaign where the owner signs off on every message, and outreach blends calls, texts, and emails from the same list. The result: reactivation that feels useful, not pushy, and booked appointments that route straight into your existing booking flow.