Edgar Lovecraft wrote:
> The two sendmail and one Lotus Notes 5 server either removed or striped
> the BCC header, while Exim, OpenWave InterMail, MS SMTP, MS Exchange, and
> qmail (I did not test postfix that I remember) all left the BCC header
> intact and unmodified.
Postfix also removes it. But when I understood the source, that's more
by accident, because the cleanup daemon does not know where the mail
originates from.