Free Inbox Placement Test
Test if your emails land in primary, promotions, or spam. Works across Gmail, Outlook, and Google Workspace.
How it works
3 quick steps from input to answer. No account, no install.
Back to the tool- 01
Pick a provider and generate a test
Choose Gmail, Outlook, Google Workspace, or Microsoft 365.
- 02
Send your test email
We give you a unique code and seed mailboxes. Send from the account you want to test.
- 03
See exactly where you land
Primary, promotions, or spam, with a score and actionable diagnostics.
Why this matters
Inbox placement is the ultimate deliverability metric. Open rates and bounce rates tell you part of the story, but only a placement test shows where your emails actually land. Running tests before launching campaigns prevents you from burning leads on emails that go straight to spam.
SendboxUnlimited placement tests across all mailboxes
Run automated placement tests across thousands of mailboxes on Sendbox. All providers, unlimited tests, on every plan.
Unlimited tests
Run as many placement tests as you need, across all providers
All providers at once
Test Gmail + Outlook + Workspace + M365 in a single run
Bulk testing
Test placement across thousands of mailboxes at once
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We provide test mailboxes across Gmail and Outlook (personal and business). You send a test email to these mailboxes. We then check where your email landed: primary inbox, promotions tab, spam folder, or not delivered.
Ready to land in primary?
Get your own isolated Sendbox setup running and start sending inside 15 minutes.
Every plan includes a dedicated IP. Cancel whenever you want.
