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Understand the cost of an uncleaned email list.
Use a calculator to explore potential waste, then follow a practical workflow to clean your data and measure what changes. Start with your own list size and sending volume.
Interactive calculator
Dirty List Cost Calculator
Estimate potential wasted platform spend and sends from invalid contacts. Adjust the inputs to compare scenarios for your list.
Estimate your list costFrom estimate to action
- Enter your list size, sending volume, and assumptions.
- Use the estimate to prioritize a cleanup.
- Verify the list and measure actual campaign results.
Estimates support planning. They do not measure actual losses or guarantee savings, delivery, or inbox placement.
Choose your next step
01
Prepare and clean a CSV email list
Review the workflow from file preparation to separating validation results before your next import.
02
Calculate your email bounce rate
Measure actual bounced messages as a share of sent emails, and distinguish temporary from permanent delivery failures.
03
Explore the bulk email verification workflow
See how batch verification fits into cleaning an existing list before it enters a sending platform.
Before using an estimate
Does the calculator measure my actual losses?
No. It models a scenario using your inputs and assumptions. Compare the estimate with actual platform bills, validation results, and campaign data before making a decision.
What should I do after estimating my list cost?
Review your source data, verify the list, separate the results, and measure delivery outcomes. The CSV cleanup guide and bulk verification workflow above explain the next steps.