Email Deliverability Calculator
Delivered is not the same as inboxed.
Inbox placement
84%
3,744 messages in spam folders
"Delivered" only means the receiving server accepted the message — it says nothing about which folder it landed in. The gap between delivery and inbox placement is worth $18,870 a year here, and it is invisible in standard campaign reporting.
How the Email Deliverability Calculator works
Delivered only means the receiving server accepted the message; it says nothing about which folder it landed in. The gap between delivery and inbox placement is invisible in standard campaign reporting and frequently worth more than any subject line test.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
What is inbox placement?
The share of delivered messages that reach the inbox rather than the spam or promotions folder. It is not reported by email platforms and requires seed testing or a third-party tool to estimate.
Why does delivery rate look fine when placement is poor?
Because the receiving server accepted the message either way. Acceptance and filing are separate decisions, and only the first appears in your reporting.
What drives inbox placement?
Engagement above all — mailbox providers watch opens, clicks, replies and deletions without reading. Authentication, complaint rate and consistent sending volume matter too.
How do I improve it?
Remove dormant contacts, authenticate properly with SPF, DKIM and DMARC, keep complaint rates low and send consistently. Sunsetting unengaged subscribers is usually the single largest improvement available.