The Queue Retry Time represents how often each queue (incoming, outgoing, and unscanned) is processed to see which messages need to be retried. Default is 10 minutes (600 seconds). The Message Retry Time is how long a message will sit in its queue before being retried. Default is one hour (3600 seconds). The Message Lifetime is the amount of time a message will sit in the queue before it is considered undeliverable, and deleted. Default is 5 days (432000 seconds)