[exim] Big Brother: Bcc all SMTP traffic

Hi there,

I have a hosting company and one of my clients has an investment company.
In order to comply with SEC regulation he needs to keep track of all trafic that is incoming and outgoing.
His request is:

All the users who are using the SMTP of his domain, should Bcc to him the outbound traffic.

How would I implement such a mechanism?

Yes,. he is aware that if a user is using a different provider to mail out, it is obviously not going to be Bcc to him, but it is
a matter of good faith in the company.


Any suggestions?

-Alon.