If the avoidable cost is meaningful, inspect the source list before sending. Cleaning can identify duplicates and malformed rows; verification can keep valid, invalid, and unknown evidence distinct.
How to read the result
Estimated bounced messages
This is the send count multiplied by your assumed bounce rate. It is not a measurement of your current list and should not be presented as a guaranteed outcome.
Allocated sending cost
This is the estimated bounced-message count multiplied by the cost per 1,000 sends you entered. It excludes opportunity cost, reputation impact, taxes, and remediation work.
What to do next
Calculator questions
What does this calculator estimate?+
It estimates the number of bounced messages and the allocated sending cost from your planned send count, assumed bounce rate, and cost per 1,000 sends. It is a planning model, not a prediction of mailbox behavior.
Does the estimate include lost revenue or reputation damage?+
No. The calculator only estimates the direct sending-cost allocation you enter. Lost opportunities, sender reputation, remediation time, and taxes are excluded.
Can email verification guarantee the result?+
No. Verification provides evidence about a checking moment. Receiving policy, consent, sender reputation, content, timing, and later mailbox changes still affect delivery.
How should I use the estimate?+
Use it to decide whether a list deserves a hygiene preflight and verification pass before sending. Keep invalid and unknown results separate rather than assuming every non-bounce is safe.