What happens when the wrong list is uploaded?

Wrong list upload consequences:

Possible scenarios:

Sent to unsubscribed users (complaints, legal issues)

Sent to old, stale list (bounces, traps)

Sent to wrong company's list (confusion, complaints)

Sent to test list in production (embarrassment)

Immediate effects:

Complaint spike

Bounce rate spike

Potential spam trap hits

Recipient confusion and anger

Response:

Stop any remaining sends immediately

Assess damage (how many sent)

Prepare communication/apology if needed

Document what happened

Prevention:

Verification steps before upload

Test segment before full send

Clear file naming conventions

Loading the wrong cargo onto the ship causes problems at every destination.