you may find the bcc addresses in the sendmail log.
> > I've checked all the headers on BCC'd posts and can't find anything
> > to indicate that they were BCC'd - although I know they were. Also
> > gone through all the info I have on configuring the list and nothing on
> > blocking BCCing there either. <sigh>
> Indeed. The entire BCC concept is that it is in fact "blind" (the "B"
> in "BCC") to the named recipients. The BCC recipients have been
> separately delivered to before a copy of the message is forwarded to
> you, and any evidence of their addresses (or even the existence of a
> BCC line at all) should have been removed.