Outlook express: posting to nntp + email at the same time

Y

YourName

I've setup a local newsgroup server and i can successfully read/post to it
with Outlook express. There are also no problems accessing the mail server.
However, when i post to the newsgroup *and* carbon copy (cc) someone on the
mail server i get a message:
"The message could not be sent. An error has occurred."

The message actually does get make it to the newsgroup server but not to the
email server.
Any clues?
 
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