INBOX PLACEMENT TEST // SEED PANEL
Inbox Placement Test: See the Folder, Provider by Provider
Open rates tell you what happened two days too late, and delivery rates count the spam folder as success. An inbox placement test answers the only question that matters before you hit send: which folder, at which provider.
Inbox placement
79%
··%
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Authentication
checking 130+ blacklists
Sample data. Seed results are estimates, not guarantees.
What is a inbox placement test?
An inbox placement test sends a real email to a panel of seed mailboxes and reports the folder it landed in at each one: inbox, Promotions, or spam. Inboxes runs the test against 27+ live seeds across Gmail, Outlook, Yahoo, iCloud, GMX, and Zoho; you send from your own ESP, so the result reflects your actual domain, IP pool, template, and headers. The grid fills in within minutes, with Gmail tab detection that calls a Promotions landing what it is: delivered, but not where an order confirmation or a flash-sale alert needs to be. Auth results and blacklist hits ride along with every test. Seed panels are directional estimates of a real audience, never a guarantee of it, and no honest vendor will tell you otherwise.
What you get
Inbox placement test, done properly
Real mailboxes, real filters
Seeds are live accounts at 6 providers, so results come from the same filtering stack your subscribers sit behind, not a simulation of it.
Promotions is its own answer
For an e-commerce sender the gap between inbox and Promotions is the gap between a launch and a shrug. The grid separates the tab from the inbox and from spam.
Minutes, not a post-mortem
The board fills in within minutes of your send, early enough to fix a template or an auth failure before the full list goes out.
Trends across sends
Every test is stored, so you can watch Gmail placement move from 60% to 85% as fixes land, instead of guessing from one noisy snapshot.
How it works
From send to fix list in four steps
Create a test
Get your seed list and a test ID to drop into the subject or body.
Send from your platform
Fire the campaign from your own ESP to the seeds; nothing to install and no DNS changes needed to test.
Read the grid
Per-provider placement, Gmail tab detection, auth parsing, and blacklist status arrive together within minutes.
Fix and repeat
Apply the ranked fixes, re-test, and compare boards side by side to confirm real movement.
The honest boundary: seed results are directional estimates and nobody can guarantee inbox placement. Inboxes finds the fixable causes, tells you exactly what to change, and monitors the result. No warmup networks, no bot opens, ever. Full detail on the methodology page.