Postfix snapshot 20141119 adds support for BCC actions in
header/body_checks and milter_header_checks. There is no limit on
the number of BCC actions that may be specified, other than the
implicit limit due to finite storage. BCC support will not be
implemented in Postfix delivery agents.
The result is the same as with always_bcc and sender/recipient_bcc_maps:
there can be only one address per action, recipients are added with
the NOTIFY=NONE delivery status notification option, and duplicate
recipients are ignored (with the same delivery status notification
options).
Wietse
