Question : Problems sending CC's to other persons in Exchange 2003 network.

Email error when sending CC to another user.  Here is her problem I sent an e-mail and CC'd Person 1.  Person1 did not get my original e-mail but did receive the reply from the person2 who I had sent the original e-mail to.  

Answer : Problems sending CC's to other persons in Exchange 2003 network.

Did the original sender of the e-mail get an undeliverable message? If not, it's possible that it got caught up in a spam filter.