Discovery of sent and received email with POSTFIX
 

For legal reasons, I may soon be required to have the ability to provide a user's emails to authorities as part of a discovery action.

Not just a copy of backup.

I'm running postfix with dovecot on rhel5.

I'd need to be able to produce emails sent and received in a given time frame by a given user.

Has anyone had to do this before?

Auto BCC
 

Take a look at the always_bcc option. If you want anything more complicated, you're better off with Exim.

Anyhow, in what legal scenario is anyone required to keep a copy of any and all mail sent? That's a huge amount of data.