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> Sendmail normally defaults to just "giving up" and NDRing a message if
> it sits in the queue for more than four days.  Did you turn this off,
> by some chance?

I believe that sendmail makes one last try to deliver a message before
it bounces it due to inability to send for N days... i.e., the logic is:

	try_to_deliver_message
	if hard_failure OR (soft_failure AND message_in_queue_too_long)
		return_to_sender


rather than:

	if message_in_queue_too_long
		return_to_sender
	try_to_deliver_message
	if hard_failure
		return_to_sender

					- Bill

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