PLACEMENT Inbox placement testing

Inbox placement testing, before your reply rate tells you.

A delivery rate counts what the receiving server accepted. It counts spam-foldered mail as delivered. Placement testing measures where the message actually landed, per provider, and it is what gates every step of the ramp instead of a calendar.

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What it covers

Seed accounts per provider
Gates the warmup ramp
Any platform, not just ours
Cause, not just symptom

The distinction

Delivered and inboxed are not the same number.

The short answer

A delivery rate of 98% can sit on top of an inbox rate of 40%. Delivered only means the receiving server accepted the message. It says nothing about whether the message went to the inbox, the spam folder, or a promotions tab nobody opens. Inbox placement testing is how you measure the difference, and it is the only number that predicts replies.

How it works

Seed accounts, across the providers you actually send to.

A seed list is a set of monitored mailboxes we control across the major providers. Your campaign goes to them alongside your real list, and we read where each copy landed.

Seeds go out with the send

The test message is the real message, not an approximation, so what we measure is the campaign you are actually running rather than a lab version of it.

We read every mailbox

Inbox, spam, promotions or missing entirely, recorded per provider. Google behaving differently from Microsoft is the normal case, not the exception.

The result gates the ramp

During warmup, placement decides whether volume goes up this week. A dip holds the ramp where it is instead of pushing more mail through a narrowing gap.

Testing continues after launch

Placement moves as providers change their filtering and as your content changes. A single test at launch tells you about launch day and nothing after it.

What it catches

Four problems you cannot see from a delivery report.

Placement problems

Spam foldering at one provider only: Microsoft filtering you while Google does not is common, and an averaged delivery rate hides it completely.
Promotions-tab burial: Technically inboxed, practically invisible. Worth knowing before you conclude the offer is wrong.

Cause, not just symptom

Content and authentication: Spam scoring on subject and body, plus SPF, DKIM and DMARC checks, so a placement drop can be traced to a cause rather than guessed at.
Reputation and blocklists: Blocklist monitoring and Google Postmaster data alongside the placement result, which is usually where the explanation is.

Why it matters here

Placement testing is what makes a cold ramp safe.

On an opted-in list you can afford to find out slowly. On cold or purchased data you cannot, because by the time reply volume tells you something is wrong the reputation damage is already done.

Before

Verified before the first live send

New infrastructure gets tested before your real list ever touches it. Finding a configuration problem on seed accounts costs nothing. Finding it on 400,000 cold records costs the IP.

During

Every step of the ramp is earned

Volume rises against a measured number rather than a schedule. This is the difference between a ramp and a countdown, and it is why our warmup takes four to six weeks rather than a promised ten days.

After

You find out before your reply rate does

Placement usually falls before replies do. Watching it gives you a fortnight of warning, which is the difference between an adjustment and a recovery project.

Questions

Inbox placement testing, answered.

What is inbox placement testing?

Inbox placement testing measures where your email actually lands: inbox, spam folder, promotions tab, or nowhere at all. It works by sending your real campaign to a set of monitored seed mailboxes across the major providers alongside your real list, then reading each one. It is different from a delivery rate, which only tells you the receiving server accepted the message.

How is this different from my delivery rate?

A delivery rate counts messages the receiving server accepted. It counts a message routed straight to the spam folder as delivered, so a 98% delivery rate is entirely compatible with a 40% inbox rate. Placement testing measures the part that decides whether anyone reads the mail.

How often should placement be tested?

Continuously during warmup, because each volume increase should be earned against a current measurement rather than a calendar. After launch, regularly rather than once: providers change filtering, your content changes, and reputation moves. A single test at launch describes launch day only.

Can you test placement if we send from another platform?

Yes. Placement testing and the free 30-minute diagnosis are platform-agnostic, and most of the setups we look at are running somewhere else entirely. If moving turns out to be the right answer we will say so, but plenty of engagements end with a client fixing things where they already are.

What do you do when a test comes back bad?

Work backwards from the result. Placement is read per provider, so the first question is whether it is everywhere or only at one, then it is checked against authentication, spam scoring on the content, blocklist status and Google Postmaster data. Usually the cause is one of those rather than a mystery, and the fix is specific.

Does testing guarantee inbox placement?

No, and be careful with anyone who says otherwise. Placement depends partly on your content, your offer and your audience, none of which are ours to control. What testing guarantees is that you know your placement number rather than assuming it, and that you find out about a decline early enough to act on it.

Get started

Find out where your mail is landing.

Tell us what you send, where from, and what you are seeing. The 30-minute diagnosis is free and platform-agnostic, including if the answer is that you should stay where you are.

A real placement number rather than a delivery rate
If it is bad, the cause traced rather than guessed
Free either way, and useful whether or not you become a customer

Prefer to talk? 1-800-604-5058

Measure it, or assume it.

Placement usually falls before replies do, which makes it the earliest warning you can get. Tell us what you are sending and we will tell you where it is landing.

Talk to a deliverability expert See pricing