What is a responder loop?
This is the condition that occurs where two auto-responders are auto-responding to each other in a tight loop filling up both email boxes. We have taken many careful steps to ensure that our auto-responder will not ever get caught in one of these loops. The first line of defense is that we inspect every message for any sign that it might have originated from another auto-responder (or mailing list) and will not respond in those cases. However, there are a number of very poorly written auto-responders in the world that masquerade themselves as human senders. There is only one way to protect against loops from these and that is to put a minimum delay for how often we will respond to a given sender. This stops a responder loop before it can get started, by silently ignoring additional email messages from the same address in any given 10 minute period of time.