Parental Controls

[Joe Kraft]

I'm looking for some type of parental control that would allow easy 
screening of e-mail coming in and out for my kids.

I'm thinking of something where all inbound and outbound communications 
would need to be approved before being sent.  Maybe it could be as easy 
as having postfix deliver me a copy of what they're sending.

 From what I've seen, this is a question that tends to drift off topic 
quickly.  Please only technical replies, no philosophical, first 
amendment, parenting type replies.

Thanks,
Joe.