Inbox Placement Test: See Where Your Email Actually Lands

A spam score tells you if your email looks spammy. An inbox placement test tells you where it actually landed — inbox, spam or tabs — at each provider. That is the difference between guessing and knowing.

How inbox placement testing works

You send your campaign to a list of seed mailboxes spread across Gmail, Outlook, Yahoo, AOL and others. The testing tool checks each seed to see where your message landed and builds a per-provider report. Unlike a spam score (which just analyzes content), placement testing shows the actual outcome.

Why per-provider results matter

Gmail might put you in Promotions while Outlook puts you in Junk. A single score hides that. Per-provider data lets you isolate and fix the specific problem at the specific provider — maybe it is an Outlook DKIM issue, or a Gmail content flag.

Start your first inbox placement test — 2 free tests, per-provider results.

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Tools that offer inbox placement testing

Mail-tester and GMass do not offer true per-provider placement testing.

Evidence & transparency. Checked against public data: public documentation on seed-list testing methodology. Not independently tested by us: seed-list coverage completeness. Reader should verify: current provider coverage and test limits. Last reviewed: June 2026.

Frequently asked questions

Is an inbox placement test different from a spam test?
Yes. A spam test scores your content. An inbox placement test shows where your email actually landed at each provider. GlockApps does both in one report.

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See where your emails really land

Run a free deliverability test with GlockApps and check your inbox placement across Gmail, Outlook and Yahoo, plus spam score and blocklist status.

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