We are runnning MS Exchange 2003. We have set up many distribution lists when email blasts can be sent to all. These lists are, by theory, restriced so that not everyone can send email blasts. However, someone who should not, by theory, have been allowed to send a balst was able to. I have been given the taks to find out how this could have happended. Outside of verifying AD groups, I am not sure where or how to proceed. Any help and direction would be appreciated.