Postfix: copy of all outbounds relays to myself

[redhatdude@xxxxxxxxxxxxx]

Hi,
Is it possible to get postfix to send me a copy or every single email  
that is relayed through it?
I've seen two emails that I haven't sent go out and I wonder how that  
happened. I have my smtpd server with TLS and sasl2 authentication  
for just one user. However, I allow emails sent from the localhost. I  
don't know how these two emails got through and I'd like a copy of  
anything relayed so I can see who or what sent it. At the moment, I'm  
the only user since I just set up postfix with cyrus-imapd and  
roundcubemail.
Thanks,
EJ