ZapBounce and Moosend
Moosend prices by subscriber count and triggers automations on list membership. Both of those make the import the moment that matters, because that is when a contact starts costing money and starts receiving mail.
Verifying afterwards means paying for the addresses and sending to them at least once.
Membership is the trigger and the billing unit at once
Adding a subscriber to a list in Moosend can start an automation and increments the billable count in the same action. There is no staging area where an address waits to be checked.
The practical consequence is that a ten-thousand-row import with a fifth of the addresses dead sends two thousand emails that bounce, and bills you for two thousand subscribers that will never open anything.
Moosend stops sending to an address after repeated bounces, which limits the ongoing damage and does not refund the first send.
How the data moves
Verify the file before it reaches a list
The list is where billing and automation both begin. Anything checked after that point has already cost you both.
Export and re-import as CSV
Moosend exports subscribers with custom fields, and those columns return untouched in the verified file.
Use a custom field for the verdict
Moosend segment conditions read custom fields, so the verdict can gate a campaign without deleting anyone.
Remove invalid subscribers to cut the bill
Unsubscribing keeps the record; removing reduces the count. Export the results file first either way.
Setting it up
- Export the subscriber list from Moosend as CSV with custom fields.
- Verify the file before importing anything back.
- Create custom fields in Moosend for the verdict and the check date.
- Import the verified file, matching on email so existing subscribers update.
- Build a segment on the verdict field and point campaigns at it.
- Put catch-all subscribers in their own list with their own send schedule.
Moosend: common questions
Does adding a subscriber trigger automations immediately?
If an automation is set to trigger on list membership, yes. Verify before the import rather than after.
Will removing subscribers lower my bill?
Yes, Moosend prices by subscriber count. Keep the results file so the record of what was removed survives outside the platform.
Can I verify inside Moosend?
There is no built-in check. The verification happens before the file is imported.
Check a Moosend export today
100 free checks a month, no card. Unknown results and duplicates are never billed.