The autoresponder have been working for a while just fine. We usually send an email to the customers 10 days after shipping to ask for feedback.
In the past 2 days I start having problems. For some reason the autoresponder is being reloaded like 100 times within an hour.
I have the cron set for 2pm everyday which is the same settings that have been working. Monitoring the server it seems that the autoresponder is in an endless loop so it keep being reloaded.
Any suggestions on what might be the reason?