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Metrics type: Supporting Metrics • Category: Ecommerce Platform

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At a glance

Customers in the database with Customer.emailMarketingConsent.state IN ('NOT_SUBSCRIBED','UNKNOWN') or whose email has bounced. The marketing-deliverability canary; uncovers customers who’ve opted out, never opted in, or have unreachable emails.

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Calculation

Calculated automatically from your Shopify data. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading.

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Worked example

A UK lifestyle brand on Shopify, ~24,000 customer base. Snapshot 12 May 26. The card reads 24.2%, 14.2 ppt above the 10% threshold. Six things to notice:
  1. The alert is firing. 24% unverified is well above healthy norms. For a UK lifestyle brand, target 5-15% unverified. Above 20% means the brand is sending emails to ~5k customers who aren’t receiving.
  2. The “not subscribed” cohort is the biggest piece. 4,200 customers (17.5%) never opted in. Likely guest checkouts who didn’t tick the marketing consent box. Recover via post-purchase opt-in flow.
  3. Opted-out is small but signal. 980 customers actively unsubscribed. Trend: if this is rising, your email content or cadence may have issues.
  4. Bounced rate of 2.6% is unhealthy. Industry benchmark: <1%. Investigate list-hygiene practices; a 2-3% bounce rate over time gets your brand flagged by Gmail / Outlook spam filters.
  5. Marketing-spend efficiency. If you pay Klaviyo per active profile, 5,800 unverified customers are dead weight on the bill. Either re-engagement or list-pruning saves cost.
  6. GDPR compliance signal. Customers without SUBSCRIBED status receiving marketing email is a GDPR risk in EU/UK. Pair with deliverability tools to confirm sends respect consent.

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Sibling cards merchants should reference together

Unverified Emails is the deliverability canary. Companions:

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Reconciling against the vendor’s own dashboard

Where to look in Shopify Admin:
Shopify Admin → Customers filtered by Email subscription status: Not subscribed OR Email subscription status: Unsubscribed
The most direct equivalent. Sum the matching counts and divide by total customer count. Other Shopify Admin views:
  • Customer segments: build segments based on consent status.
  • Apps like Klaviyo, Mailchimp, Hubspot: their dashboards expose deliverability health in detail.
Why our number may legitimately differ from Shopify Admin: Cross-connector reconciliation:

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Known limitations / merchant FAQs

Why is my unverified rate so high? Three usual causes:
  1. Guest checkout dominant: customers complete checkout without ticking marketing consent. Common; consent uptake at checkout is typically 30-60% even with prominent prompts.
  2. Imported customers from previous platform: bulk imports often arrive without consent state. Default state for ambiguous imports is “not subscribed”.
  3. Cleansing not run recently: opted-out and bounced customers accumulate over time. Quarterly hygiene reviews keep the rate manageable.
What’s a healthy unverified rate? Category-dependent rough guides:
  • Pure DTC subscription brands: <5%. Email is the channel; opt-in is mandatory.
  • Standard DTC: 10-20%. Welcome flow recovers most.
  • Marketplace-heavy brands: 30-50%. Many customers never opt in.
  • Hybrid retail: 25-40%. POS captures don’t always include email consent.
Should I email unverified customers anyway? GDPR / CAN-SPAM constraints: emailing customers without consent is illegal in EU/UK and risky in US. Don’t. Three legitimate recovery paths:
  1. Re-engagement campaign: confirmation-of-interest emails to opted-out customers (request fresh consent).
  2. Post-purchase consent flow: email customers who’ve recently bought asking for consent (must be carefully crafted to avoid being unsolicited).
  3. List pruning: just remove bounced and long-stale unverified records to keep your sender reputation healthy.
Why are bounce rates so important? Above 1-2% bounce rate, mail providers (Gmail, Outlook, Yahoo) start to flag your sender domain. Above 5%, you risk being marked as spam by default. List-hygiene matters for deliverability of your good customers’ emails. Does this card respect Shopify’s email-marketing consent model? Yes. We use Customer.emailMarketingConsent.state field directly. The model has four states (SUBSCRIBED, NOT_SUBSCRIBED, PENDING, UNSUBSCRIBED); this card flags everything except SUBSCRIBED plus bounced. Action playbook for managing unverified emails:
  1. Quarterly list pruning: remove customers bounced >3 times and customers with no engagement >18 months.
  2. Consent flow audit: confirm post-purchase opt-in is firing for guest checkouts; A/B test wording.
  3. Re-engagement campaign: target opted-out customers with a confirmation request.
  4. Deliverability monitoring: pair with Klaviyo / mailing-tool deliverability dashboards.
  5. GDPR compliance: confirm only SUBSCRIBED customers receive marketing; this card identifies the population that shouldn’t be receiving.
  6. POS opt-in capture: train staff to capture email consent at till; the gap between in-store and online consent rates is often large.

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Tracked live in Vortex IQ Nerve Centre

Unverified Email Customers is one of hundreds of KPI pulses Vortex IQ tracks across Shopify and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English. Start for free or book a demo to see this metric running on your own data.