Ok, here are some things that I would try.
On the machine where it does not work:
- Restart the PC, drop (close) the internet connection, and then try
again. Does it try to connect to the internet? If not, maybe there is
some problem with internet connectivity on that machine.
- Try email addresses with different domains; eg. (e-mail address removed),
(e-mail address removed). (Use your own examples, of course.) It might be that
the emails are arriving at some domains, but not at others. This is
increasingly common, these days, where everyone has a spam filter.
Perhaps, by coincidence, the bad machine is sending emails to a domain
that is not accepting them.
- Could it be a "user" difference? Perhaps the users on the good
machines have administrative priviliges, but the users on the bad
machine do not. Perhaps the software only works for users with
administrative priviliges.
- Do some google searches. I see nearly a thousand hits for "cdo send
fails" (without the quotes) in google groups, and many more in google
web.
HTH,
TC