I am running on Windows 7 with Windows Live mail 2012.  I have several email addresses that I cannot get my emails to go through.  I have tried sending emails to these addresses via other email programs (yahoo, charter, outlook express etc) and they all go through.  I have checked with the recipients and they said they are receiving all their other emails. It seems to be a problem only using WLM 2012.   Here is the message I am getting:

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-
tion parameters.

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 xxxxxxxxx.net is not responding.  (host address deleted for privacy)

The following recipients did not receive this message: