Your email platform says 99% delivered. That number is almost entirely meaningless as a deliverability signal.
Delivered, in ESP terms, means the receiving mail server accepted the message and didn’t bounce it. Once the message crosses that handoff, your ESP has zero visibility into what happens next. Gmail can accept your email and route it directly to spam. Yahoo can accept it and drop it in junk. Klaviyo, Mailchimp, and Omnisend have no visibility into where it ended up, because that decision happens inside the mailbox provider’s infrastructure after the handoff.
So when someone asks how to check whether their emails are landing in spam, the honest answer is: you can’t find out from your ESP dashboard. You need a tool that has eyes inside the inbox.
One pattern that shows up consistently across senders who start monitoring for the first time: a significant share have at least one mailbox provider, usually Gmail, where spam placement is materially higher than the others, and they had no idea because their overall open rate looked normal. The problem was always there. It just wasn’t visible.
Why Open Rate Is Not a Deliverability Signal
Most eCommerce teams use open rate as a proxy for inbox placement. If people are opening the email, it must have landed in the inbox. The problem is that this logic breaks in two places.
First, Apple Mail Privacy Protection (MPP) pre-loads tracking pixels for Apple Mail users, which Klaviyo and every other ESP records as an open, regardless of whether the email was read or even noticed. For senders with a heavy Apple Mail audience, a significant portion of reported opens are machine-triggered.
Second, and more directly relevant to spam placement: the people whose emails landed in spam aren’t opening anything. Their silence is invisible in your open rate. A campaign with 30% of Gmail recipients landing in spam looks like a normal send in Klaviyo, just with slightly lower opens. Without placement data, you’d iterate on subject lines and send times chasing a problem you’ve never correctly identified.
What InboxEagle Actually Shows You
InboxEagle tracks inbox placement at the campaign level, broken down by mailbox provider. When you click into Deliverability on the dashboard for any campaign, you see three provider sections: Gmail placement, Yahoo placement, and AOL placement.
Each section shows:
- Inbox % — the share of emails that reached the primary inbox
- Promotions tab % — the share that landed in the promotions tab (Gmail-specific)
- Spam % — the share that went to the spam or junk folder
Alongside that placement data, the same view shows you the full technical picture for that send: the sending domain, the sending IP address, the subject line that was used, the timestamp when the email was received, and the authentication result for SPF, DKIM, and DMARC.
That combination of placement outcome plus the technical signals that caused it is what makes the data actionable. If Gmail spam percentage is elevated and DKIM is failing, that’s your fix. If spam percentage is elevated and authentication is clean, the investigation shifts to sending IP reputation or complaint rate. The view gives you both the what and the signals pointing to why.
The Campaign-Level Scoring System
InboxEagle also gives each campaign an email performance score out of 100. This score factors in placement results, authentication pass rates, and engagement signals into a single number that lets you compare campaign health at a glance, without digging into raw percentages every time.
This is especially useful for spotting trends. If your score was consistently 85 to 90 across the past 12 campaigns and it drops to 64 on your last send, that’s a signal that something changed, even if the open rate held up because of Apple Mail MPP inflation.
For Brands: Your Dashboard View
When you log into InboxEagle as a brand, the main dashboard surfaces two things: your managed sending performance and competitor intelligence.
Your brand’s performance shows across every campaign you’ve sent through InboxEagle monitoring: number of campaigns tracked, your top-performing campaigns by score, your average email performance score across all sends, and your best campaigns. This gives you a program-level health view, not just a per-campaign view. Over time, you can see whether your average placement score is improving, holding, or declining, which tells you whether the deliverability work you’re doing is actually moving the needle.
Tracked Brands is where it gets interesting. InboxEagle lets you follow other brands and see insights from their campaigns. For an eCommerce brand, that means you can watch how competitors are performing and how their deliverability compares to yours. This isn’t about copying; it’s about calibration.
Say your Gmail inbox placement is sitting at 78% and you’re not sure if that’s a you problem or an industry-wide Gmail filter change. You check the three brands you’re tracking in InboxEagle and they’re all consistently above 90%. That gap tells you immediately that this is not a Gmail-wide issue. Something is structurally wrong on your side, and it’s worth investigating your complaint rate, list quality, or authentication setup. Without the benchmark, you might have waited another month to act.
For Agencies: Managing Multiple Clients from One Place
The Manage Brands section of the dashboard is built for two types of users: agencies managing multiple client accounts, and eCommerce operators running more than one store. Each brand you’ve added shows up as its own card with its own metrics: campaigns sent, top campaigns by score, average performance score, and best campaigns.
For agencies, this matters operationally. When you’re managing email deliverability across 10 or 15 clients, you don’t have time to log into separate tools for each one and manually reconstruct a health picture. For multi-store brands, it means you can see whether your deliverability health is consistent across all your stores or whether one is quietly pulling your domain reputation down. InboxEagle gives you that picture across all brands in a single view.
When a client’s average score drops or a specific campaign shows elevated spam placement, you click into their brand view, open the Deliverability detail for that campaign, and see the full breakdown: Gmail/Yahoo/AOL placement percentages, sending domain, IP, authentication results, subject line, and received timestamp. You arrive at the client call with a diagnosis, not a guess.
The Tracked Brands feature also has a specific use for agencies. If a client asks how their deliverability compares to competitors in their category, you can track those competitor brands in InboxEagle and show the comparison directly. That kind of benchmarking context is difficult to produce without a tool that’s actually monitoring inbox placement, and it’s a meaningful addition to a deliverability report.
Bot Analysis: The List Problem You Don’t Know You Have
Bots on your list inflate open rate metrics, distort the engagement signals you use for segmentation, and increase your Klaviyo contact count unnecessarily. InboxEagle’s Bot Analysis identifies which addresses are bots based on activity patterns, so you can suppress them. The result is more accurate engagement data and a lower Klaviyo bill.
Integrations That Connect the Picture
InboxEagle’s placement monitoring connects to the tools already in your stack.
Klaviyo: The Klaviyo integration links campaign-level performance data from Klaviyo to InboxEagle’s placement results. You can see Klaviyo’s engagement metrics (opens, clicks, bounces, complaints) alongside InboxEagle’s placement outcome for the same send. When a campaign underperforms, you’re working with the complete dataset rather than two separate views.
Google Postmaster Tools: InboxEagle connects to Google Postmaster Tools to pull Gmail-specific domain reputation data: spam rate, domain reputation classification, IP reputation, and delivery errors. Postmaster Tools is the authoritative source for how Gmail sees your sending domain. Gmail’s sender guidelines set the spam rate thresholds that Postmaster Tools measures against: stay below 0.10% to maintain inbox placement, and above 0.30% deliverability impact is severe. Having that data inside InboxEagle, alongside your placement results, means you can correlate a Gmail placement drop directly with a Postmaster Tools reputation signal without switching between platforms.
Amazon SES: For senders using Amazon SES as their sending infrastructure, InboxEagle monitors placement and reputation signals across SES-routed sends the same way it does for Klaviyo campaigns. The campaign-level deliverability view shows the same Gmail/Yahoo/AOL placement breakdown and authentication results regardless of which sending infrastructure the email came from.
What You Typically Find When You First Connect
The findings when a brand first connects to InboxEagle follow a consistent pattern. A provider-specific placement gap where Gmail is underperforming Yahoo. An authentication failure on live sends that looks fine in Klaviyo. A spam rate trending toward Gmail’s threshold without anyone noticing. Or bots inflating list size and engagement metrics.
For a full breakdown of what to look for and how to diagnose each finding, see what a deliverability dashboard should show.
Is InboxEagle an Email Spam Checker?
It depends on what you mean by that term, because “spam checker” covers two very different things.
Most tools marketed as spam checkers analyze a draft of your email in isolation. They look at your HTML structure, authentication headers, whether you’ve included an unsubscribe link, and whether your subject line or body copy matches known spam patterns. They produce a spam score or a pass/fail result against a set of rules. Useful for catching obvious mistakes, but they never actually send the email anywhere, so they can’t tell you where it landed.
InboxEagle works differently. It monitors your live campaigns after they’ve been sent through your real sending infrastructure, with your real domain and IP, to your real audience. The placement data you see in InboxEagle reflects what actually happened at Gmail, Yahoo, and AOL, not what a rule engine predicts might happen. That’s a fundamentally different kind of answer.
A spam score tells you what filters might flag in a controlled test. InboxEagle tells you what your domain reputation, sending IP, and authentication setup are actually producing in the real world, campaign by campaign, with a full history you can trend over time.
Getting Started
The setup is straightforward. Connect your sending domain, link your Klaviyo account if you’re using Klaviyo, and from the next campaign you send, InboxEagle starts tracking placement and scoring each send. For a full breakdown of every signal InboxEagle surfaces and what each one tells you, see what a deliverability dashboard should show. If you want to understand how seed list testing and live campaign monitoring work together, seed list testing vs. real-world inbox monitoring covers both methods side by side.
If you’re an agency, add each client brand to your dashboard. Each brand tracks independently with its own placement history, performance scores, and bot analysis.
The question “are my emails landing in spam?” should have a factual answer for every campaign you send, not a guess derived from open rates that may be 40% machine-generated. InboxEagle gives you that answer, broken down by mailbox provider, campaign by campaign, alongside every technical signal that explains why.
You can create a free InboxEagle account and have placement monitoring running on your next send in under 15 minutes.
Note: Content created with the help of AI and human-edited and fact-checked to avoid AI hallucinations.
