Your emails are written perfectly. They're landing in spam.

Why your open rates are lying to you right now

I audited a client's email account last month and found a 47% open rate on their dashboard. Actual opens? Nine percent. Half their list had been silently routing to spam for six months, and their ESP was reporting "delivered" for every single one of them. They'd spent four months rewriting subject lines.

This is the quiet failure mode hitting email-driven businesses right now. Apple's Mail Privacy Protection broke the open tracking that most senders rely on, so the numbers in your dashboard are partly fiction — and the deliverability problems underneath are invisible until a launch falls flat.

• Coaches and course creators who haven't touched their domain settings since they launched in 2023.
• Business owners who blasted a cold or purchased list and spent their sender reputation without knowing it.
• Operators who switched ESPs and migrated all their old, disengaged subscribers with them.

Funnel Baby's 4-step deliverability audit

Step 1: Score your domain before you touch anything else

Go to mail-tester.com right now and send a test email to the address it gives you.

Mail-tester will score your domain out of 10 and tell you exactly which authentication records are missing or broken. Do this before you change a single word of copy — because if your score is below 8, nothing else matters until you fix the foundation.

• SPF record — tells receiving servers you're authorized to send from your domain; missing SPF means Google treats you like a stranger.
• DKIM signature — cryptographically signs each email; without it your messages are indistinguishable from spoofed ones.
• DMARC policy — tells inbox providers what to do when SPF or DKIM fail; "none" is better than nothing but "quarantine" is the goal.
  • Your ESP's help docs will list the exact DNS values you need; Cloudflare and GoDaddy both take under five minutes to update.

If your score is below 9, fix the authentication records first. Everything else in this list is a rounding error by comparison.

Step 2: Clean your list before you send another campaign

Every subscriber who never opens your emails is voting against you with inbox providers.

Gmail, Apple Mail, and Outlook all watch engagement signals. When a large percentage of your list ignores you, the algorithm's conclusion is that your emails aren't wanted. That conclusion becomes a delivery demotion that affects every subscriber — including the ones who do open.

• Segment your 180-day non-openers — pull them into a separate list before you touch them.
• Run a 3-email re-engagement sequence — space them one week apart; the copy is simple: "miss me?", "last chance to stay", "you're off the list."
  • Anyone who doesn't open all three gets deleted, not archived, not moved — deleted.
• Monitor your spam complaint rate — above 0.1% triggers Google Postmaster warnings; above 0.3% gets your domain put in time-out.
• Never buy a list — not once, not a "verified" one, not even from a trusted vendor.

Step 3: Fix your sending cadence and volume

Sending 40,000 emails on a domain that normally sends 200 is a spam signal, not a launch.

Sender reputation works like a credit score. You build it with consistent, low-bounce sends over months, and you can spend it in a single over-sized blast. New domains need a warm-up period. Old domains need consistency.

• New domain warm-up — start at 200 emails per day and double every 7 days over 4–6 weeks before sending to your full list.
• Send at least weekly — monthly senders get treated like strangers; inbox providers weight recent engagement heavily.
• Ramp volume before a launch — if you normally send 2,000 emails a week and your launch list is 20,000, start increasing volume 30 days before cart open.
  • A 10x spike in a single day is a red flag; a gradual ramp over a month is invisible.

Step 4: Audit your email content for deliverability signals

Spam filters in 2026 score the whole context — your domain history, your image ratio, your links.

The "avoid the word free" advice died five years ago. Modern spam filters evaluate the entire email as a document, including who sent it, what links it contains, and whether previous recipients engaged with it.

• Image-to-text ratio — pure image emails hit spam; aim for at least 60% text and 40% images as a floor.
• Test every link — one broken or flagged destination URL can tank the deliverability of the entire send.
• Use plain-text versions — every HTML email needs a plain-text counterpart; missing plain text is a spam signal.
  • Your ESP generates this automatically if you check the right box in campaign settings.
• Avoid URL shorteners — bit.ly and tinyurl links are blocked by most enterprise and government email filters.

The honest part

"Your open rate didn't drop because your subject lines got worse. It dropped because Gmail started routing you to Promotions or Spam — and most ESPs are still counting those as 'delivered.'"

Most people don't discover their deliverability problem until a launch falls flat. They blame the offer, hire a copywriter, test subject lines, swap email templates — and the real problem is that 40% of their list never saw any of it. The diagnosis takes 30 minutes. Rebuilding domain reputation after it's been damaged takes 6–8 weeks of consistent, clean sending. There is no shortcut.

What this is really about

Email deliverability is the original permission marketing. Every inbox provider — Google, Apple, Microsoft — is acting as a gatekeeper on behalf of their users. They're asking: did your subscribers opt in recently? Do they open your emails? Do they complain about them? When you earn deliverability, you're not gaming an algorithm — you're proving to a system that your subscribers actually want what you send. The brands doing $5M a year in email revenue aren't doing anything technically exotic. They have warm lists, consistent weekly cadence, and clean data. That's the whole game. The technical setup just keeps the door open; your subscribers decide whether you get to walk through it.

What to do this week

1. Go to mail-tester.com today and send a test email. Screenshot your score.
2. Log into your ESP and filter for subscribers with zero opens in the last 180 days. Count how many there are.
3. Write a 3-email re-engagement sequence this week and queue it for that disengaged segment. Anyone who doesn't open all three gets deleted.
4. Check your DNS records for SPF, DKIM, and DMARC — your ESP's help docs list the exact values they should be set to.

The Bottom Line

The best email you ever wrote is worthless if it never hits the inbox. Deliverability is the plumbing — fix it before you spend another dollar optimizing the faucets.

Funnel Baby's pick: 30 Days Summit — 30 Two-Comma Club winners on what they'd rebuild from zero.