Deliverability insights
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Gmail Postmaster Tools: What It Shows and What It Hides
Google's Postmaster dashboard is the closest thing Gmail gives you to ground truth. It is also silent on the three things that matter most. Here is the map.
Engagement-Seconds: How Long Users Actually Spend in Your Email
Opens tell you zero. Clicks tell you barely more. Engagement-seconds — how long a human's eyes are on your message — is the quality metric nobody reports.
Inbox-Placement-Rate: The Metric Inbox Check Was Built For
Delivery rate says 99%. Placement rate says 61%. The gap is where your revenue disappears. How IPR is defined, measured and reported.
Pipeline Attribution Beats Open Rate for B2B Email
Open rate tells you nothing about revenue. Pipeline attribution does. How to wire email to opportunities, why CRMs get it wrong, and the minimum viable setup.
Reply Rate: The One Email Metric That Cannot Be Faked
Opens lie. Clicks lie. Replies don't. Why reply rate is the only email metric that survives MPP, security scanners and LLM summarisers — and how to instrument it.
Is CTR still usable for B2B campaigns? A nuanced take
If scanners, proxies, and wrappers corrupt clicks, is CTR dead for B2B? Not quite. Here is when it still helps, when it lies, and how to use it responsibly.
What Apple Mail v16 changed about click reporting
Mail Privacy Protection phase 2 quietly changed what Apple Mail does to links on open. Here is the short list of changes and what they mean for your CTR.
Unique clicks vs total clicks: why both are lies
The unique/total dichotomy hides more than it reveals. Here is why both numbers are misleading and what engagement metric actually holds up.
Microsoft Defender link-click pattern analysis: a signature guide
Defender for Office 365 has its own click signature — different from SafeLinks alone. Here is how to fingerprint Defender traffic in your ESP logs.
Why click events in ESPs lag inboxing by hours
A click is not inbox delivery. Corporate archival, search indexing, delayed rendering, and shift-work recipients turn clicks into a lagging indicator.
Link-tracking wrappers break with every email client update
Outlook, Apple Mail, Gmail Android, Thunderbird, Spark — each update breaks or changes click tracking in subtle ways. A living compatibility matrix.
Your 30% CTR is really 9%: here is the math
A walkthrough of how a real B2B campaign with a reported 30% CTR reduces to 9% real human CTR after filtering scanners, proxies, and pre-fetches.
Bot clicks from security scanners: a field guide to spotting them
Barracuda, Proofpoint, Mimecast, Cisco and dozens of smaller gateways click every link. Here is how to identify scanner traffic in your click logs.
Gmail Image Proxy: why it distorts opens AND link tracking
Gmail proxies every image and now pre-fetches some links as well. Here is how that changes your open and click numbers and what to trust instead.
Outlook SafeLinks inflates your CTR by 20-40% (and how to prove it)
Microsoft SafeLinks rewrites every URL and scans it before a human ever sees the email. Those scans count as clicks. Here is how to measure the real CTR.
Open Rate Is a Vanity Metric: The Executive-Level Replacement
For boardroom reporting, open rate is indistinguishable from noise. A concise framework for CMO-level email metrics in 2027: one headline, three diagnostics, one summary score.
Why Your ESP's Open Rate Dashboard Lies (And Exactly How Badly)
We audited seven major ESPs and measured the gap between their reported open rate and a humans-only estimate. The gaps ranged from 2x to 6x — per-vendor breakdown inside.
The Case for Deleting Open Rate From Your Weekly Report
A four-week plan for removing open rate from the Monday morning report — plus a script for the conversation with leadership when the familiar number disappears.
Open Rate vs Inbox Placement: Side-by-Side, Same Campaign
We measured both open rate and inbox placement on the same 150-campaign sample. The two metrics disagreed 61% of the time. Here is when each one was right.
Why iOS 15 Killed Subject-Line A/B Testing (And What to Do Instead)
A/B testing subject lines by open rate has been statistically meaningless since September 2021. Here is the maths of why, and the modern click-based alternative.
What a Good Marketing Team Replaces Open Rate With
If open rate goes, what goes on the dashboard? A practical replacement stack of four metrics that survive proxy pre-fetch and scanner noise.
"98% Open Rate" Claims in Outreach Tools: How to Read the Fine Print
Cold-email vendors love to publish case studies with absurd open rates. Here is a buyer's checklist for spotting the tricks that produce those numbers.
Gmail, Outlook, Apple Mail: How Each One Breaks Open Rate Differently
All three mailbox providers distort open rate — but in opposite directions. Apple inflates, Outlook suppresses, Gmail does both. Provider-by-provider guide.
The Anatomy of a Fake Open: What a Pre-Fetched Pixel Actually Tells You
We recorded the raw HTTP requests behind 100,000 reported opens. Less than a third came from humans. Here is the packet-level breakdown by source.
Open Rate Is Dead in 2027: A Post-Mortem of Email Marketing's Favourite Metric
Six years after Apple Mail Privacy Protection, open rate is still on every marketing dashboard — and still meaningless. Here is the forensic case for retiring it.
How to Pitch Deliverability Investment to a Skeptical CEO
A battle-tested pitch script for CEOs who see deliverability as an operational detail rather than a strategic risk. Script, objection handling, and the single chart that closes the meeting.
Deliverability Is a Growth Lever: Here Is the DCF Model
A working discounted cash flow model that treats inbox placement improvements as a capital project. Assumptions, sensitivities, and the output sheet finance will accept.
From Vanity to Value: An Executive's Rewrite of the Email Scorecard
A line-by-line rewrite of the typical marketing email scorecard, replacing vanity metrics with value-anchored measures an executive can actually act on.
Marketing Ops Maturity Curve: Where Does Inbox Monitoring Sit?
A five-stage marketing ops maturity model with inbox monitoring placed honestly across the curve — and the signals that you are ready to move up.
Building Deliverability Into OKRs: A Template
A copy-ready OKR template that places inbox placement at the objective level, with KRs that force operational discipline without drowning the team in metrics.
The Psychological Trap of "Delivered" Dashboards
Why the "99.8% delivered" headline on your ESP dashboard is the single most damaging piece of confirmation bias in marketing ops — and what to replace it with.
The Cost of Invisible Churn: The Email-Placement Angle Nobody Models
Placement failures create a specific, modelable form of invisible churn. A framework for quantifying it and why it probably exceeds your visible churn number.
Deliverability as a Board-Level Metric: Presenting the Case
What belongs on a board slide, what does not, and how to earn deliverability a permanent line in the quarterly pack without drowning directors in jargon.
Why Your CFO Should Care About Inbox Placement: Revenue per Email
Translate inbox placement into CFO-friendly language: revenue per email sent, gross-margin impact, and why placement belongs in the finance view.
The Executive ROI Case for Deliverability Monitoring
A CMO-ready ROI model for inbox placement monitoring: inputs, math, payback period, and the single chart that closes the budget conversation.
Small E-commerce Email Deliverability: Abandoned Cart & Order Updates
For a $40k/month Shopify store, 1% inbox-placement drop on order confirmations and cart recovery can be $4k of lost revenue. The playbook for small e-commerce.
Financial Advisor Email Deliverability: Portfolio Reports & Compliance
Quarterly statements, portfolio updates, compliance disclosures. Why financial-advisor email lives under SEC/FINRA rules and still has to clear spam filters.
Insurance Email Deliverability: Policies, Renewals & Claims
Policy documents, renewal notices, claims status updates. Why insurance emails trip phishing filters and the playbook for independent agents and agencies.
Education Email Deliverability: Admissions & Parent Notifications
A missed admissions-decision email loses a student. A missed snow-day notification means parents sending kids to a closed school. Playbook for schools and universities.
Nonprofit Email Deliverability: Donors, Appeals & Receipts
Year-end giving, donor newsletters, emergency appeals, and tax receipts. The deliverability playbook for nonprofits running on lean tech budgets.