Inbox placement is one of the biggest cause of worry many email marketing programs we run for our clients. And it stems from a need to land in the primary inbox of subscribers.
If a majority of your emails land in promotions folder, then you need to continue reading this article because that's what we are going to unravel.
Before we move further, it is important to know what Inbox placement test is and how it is different from deliverability.
What is inbox placement, and how is it different from deliverability?
Deliverability is core hygiene of your sending domain. It determines if a mailbox provider accepts your message at all. On the other hand, Inbox placement is all about where your message lands after your message is accepted by the mailbox provider.
The first question is: does the email land in the inbox or the spam folder? That is a reputation signal. It reflects your domain's sender reputation, the same score covered in what a sender score below 90 means.
Two: inside Gmail specifically, even if your email land in Promotions, it is a categorisation, not a penalty. Gmail sorts marketing-formatted email into that tab now matter how trusted you are. Email dropping in Promotions tab is still delivered. It is still the Inbox, not spam.
So if you're trying to fix email landing in promotions tab, it might not be the right thing to do.
How do I know if my emails are landing in the inbox, spam, or promotions?
The whole conversation about inbox versus spam can be checked using the Google Postmaster Tools, provided by Google for free. It gives you reports your domain reputation and spam rate straight from Gmail's own data.
Microsoft SNDS does something similar for Outlook and Hotmail. And then your sender score at senderscore.org completes the picture. All three tell you, how much of your real mail reaches the inbox versus gets filtered as spam.
For Primary versus Promotions, there is no equivalent free report. Gmail does not expose tab placement the way it exposes spam rate. So check it by hand: look at your own subscription in your own inbox. Ask a handful of engaged subscribers where your last few sends landed. Watch whether opens cluster in the hours right after send, typical of Primary, or trail in slowly over a day, more typical of Promotions.
Do I need an inbox placement testing tool?
It depends which question you are actually asking. Mostly the answer is no.
For inbox versus spam, you already got the answer. It's Google postmaster Tools, SNDS and your sender score that we discussed above.
If you want to go more fine grained, the paid inbox placement testing tools is the answer. And they work differently.
Picture judging a restaurant by paying twenty strangers to eat there once, instead of asking the regulars who eat there every week. A seed panel is not your subscriber list. It has no purchase history with you, no prior engagement, none of the signals that shape how your real audience behaves.
That being said, a clean 95% inbox reading from a seed panel does not guarantee your actual list sees the same result. Your list's behaviour is what generates your reputation in the first place.
What is a good inbox placement rate?
If you are comparing spam versus inbox, the Google Postmaster domain reputation should score High with spam complaints comfortably under Google's own threshold. In plain terms, the large majority of your mail should reach the inbox, not the spam folder. Anything below High reputation deserves the same urgency as a sender score under 90.
Is there a healthy percentage for Primary versus Promotions? No, because that split is not a health metric. A brand running frequent promotional campaigns, sitting mostly in Promotions, is not sick. Gmail is correctly categorising promotional content as promotional content.
How often should I check inbox placement?
A weekly glance at Postmaster Tools and your sender score is enough for most senders. Check more closely after a real change: a new domain or IP, a platform migration, a big shift in volume or list size, or a drop in opens nothing else explains.
Should you check it daily? No. The number is a rolling signal. One bad send will not collapse it, the same way one good send will not fix a real problem.
Start here
Open Google Postmaster Tools and check your domain reputation this week. Below High, treat it as seriously as a sender score under 90: what a sender score below 90 means is where to work from.
If reputation looks fine and the concern is specifically Promotions rather than spam, that is a formatting and content question, not a deliverability one. What decides whether your email lands covers the mechanism in full.
Related reading
Deliverability
Email Bounce Rate Explained: Hard vs Soft and What's Normal
If you are seeing high bounce rate around 3% or above, this article uncovers the secret behind this and show you the fix.
Deliverability
Sender Score Below 90: What It Means and What to Do This Week
A sender score under 90 is a warning sign that your emails might be landing in the spam folder, not a verdict. This guide will help you fix a low sender score.
Deliverability
My Domain Is Blacklisted: What It Means and How to Get Off
A bounce message named a blacklist and your email is stuck. Here is how to tell which kind of list you are on, and why getting removed is the easy part.
Where to go next
Ecommerce
Most stores spend to acquire a customer once and then let them go quiet. The margin is in the second, third and fourth purchase, and that is an email problem rather than an ads problem.
How we work
The services behind this: strategy, lifecycle, deliverability and the testing that decides what actually changed.