So, yesterday morning we start getting e-mails thanking us for the $25 gift vouchers we sent our customers. We have an online store & the gift voucher "module" was being updated late at night by our website company. The tech installed the new module & sent a test $25 voucher to himself. Problem was he had the "All customers" highlighted in the send to box. Over 26,000 customers got a $25 voucher. Not the way we wanted to start our day.