|This is the error message we received. It listed about 20 yahoo addresses to which this message was not delivered. I'm sure all those computers were not turned off at the same time.|
This Message was undeliverable due to the following reason:
Your message was not delivered because the destination computer was
not reachable within the allowed queue period. The amount of time
a message is queued before it is returned depends on local configura-
Most likely there is a network problem that prevented delivery, but
it is also possible that the computer is turned off, or does not
have a mail system running right now.
Your message was not delivered within 1 days and 0 hours.
Host yahoo.com is not responding.