Ray,
There are a number of possibilities. Some questions to help troubleshoot:
- is the scheduled event that crashes running in Acceptance? Check your acceptance environment to see if the scheduled event is enabled
- if it is running, is the running against the same mail server and mailbox (or set of mailboxes) on the external server?
- How often does the scheduled event run?
- Do you have some metric about how many emails the scheduled event retrieves and processes? If so, did that number increase significantly on the day the event failed?
- Can you post more of the error log entries in your question?
My first guess would be that the scheduled event retrieved more emails (a lot more) when it crashed, but that's just a hunch. The answers to the questions above may help to determine that. If it is really volume related, then you will need to do some re-architecting of the scheduled event to retrieve and process in smaller batches.
Mike