MailerDaemon 6.5 copy rule

Hi All:

I am using mailerDaemon 6.5 (mail software) for sending and receiving mails. I did created a rule that for example if To or Cc “xyz@abc.com” then copy “def@abc.com”. copy received but sender send a massage to xyz@abc.com and also send cc to other users def@abc.com received users copy. whats the reason of this
please solve this problem

thanks