Perhaps surprisingly, postfix has documentation. http://www.postfix.org/postconf.5.html#always_bccContrast the above with http://www.postfix.org/postconf.5.html#sender_bcc_maps http://www.postfix.org/postconf.5.html#recipient_bcc_maps -- Noel Jones
I completely misunderstood in which manner it would be used. At first Ithought it would be per-user basis, but the correct usage is a single address and
nothing else. thanks Andreas