Cleaning up after classified email

I recently posted about LANL’s email troubles, and that inspired me to write a column about the same topic. Of course, not all of us have classified data actually on our servers.

However, everyone’s got some kind of sensitive information in their organizations. Are there things so secret that they shouldn’t go in your mail? For example, some companies keep all discussion of legal matters out of email so they can’t be subpoenaed. What do you do if those secrets do get in your mail server? It’s worth considering that now so that you have a plan in place before you need it.