Hi I use the scheduled email task plugin to send to a list. The list should only be accessible by doctors because the information in the list is confidential. One of the biggest problems that I encounter is that emails are sent multiple times. I can not replicate this problem, all my personal tests work fine. The ?sent? field is updated when sent, because of the condition (only if not sent) the email only goes out once. However when running live with allot more activity and a cron every 15 min almost all emails are sent more than once (up to 8 times). Every email contains a direct login link to see personal reports. Could it be that the cron is triggered multiple times before knowing that the ?sent? field is updated? It is difficult to understand the cause because the problems are not very consistent. Can you give me some advice on what the best practice would be to avoid these problems?