Free Email Placement Tester

An inbox placement test sends your email to a controlled list of tester addresses at major mailbox providers and reports where each copy landed: the inbox or the spam folder. Unlike open or delivery rates, it measures placement directly, by reading the result from real mailboxes.

Delivery rate counts mail the receiving server accepted. A message filed straight to spam still counts as delivered. Inbox placement counts mail that actually reached the primary inbox, which is the number that determines whether your campaign gets seen. High delivery with low placement is the classic hidden deliverability problem, and it is invisible in most ESP dashboards.

Click Start my free test and we generate 16 tester inboxes at Gmail, Outlook, and Yahoo. Copy the list (or download the CSV), add every address to one campaign in your normal sending tool, and send. Results start streaming the moment your campaign arrives; leaving addresses out skews your results.

Because placement depends on your authentication, your sending infrastructure, and your content. A synthetic “test” email sent from a different platform measures someone else’s deliverability, not yours. Send the campaign you would actually send, from your business email on the platform you actually use, and the results reflect production.

Inbox means the message reached the mailbox and is in front of the recipient. Spam means the provider accepted the mail and buried it in the junk folder. Missing means the tester inbox never received the message at all, which usually means it was blocked or silently dropped before filing.

Tester inboxes are clean mailboxes without personal engagement history, so they measure the parts of placement driven by your sending reputation, authentication, and content; the parts you can act on. Modern filters also personalize per recipient based on individual engagement, which no placement test can capture. Treat the result as a reliable directional read, not a per-subscriber guarantee: if tester inboxes land in spam, real recipients almost certainly do too.

The free tool allows one test per day. You can also send another email to the same tester list during a run and we create a follow-up run automatically, which is handy for before-and-after comparisons. For regular monitoring, placement testing is built into InboxAlly with a monthly allowance you can use as needed; no daily cap.