Ralph Corderoy:
> Hi Bill,
>
> > > If not, what's the closest to a specification?
> >
> > The documentation in the software that adds it. In this case
> > specifically the man page for postconf(5)
>
> I'd already read that, e.g. prepend_delivered_header, and it doesn't
> describe Postfix's logic for producing "mail forwarding loop", e.g. does
> it only check on final delivery so if it's a relay then it doesn't care?
The Postfix code that ADDS the delivered-to header will
report a loop if that header already exists.
Doing it otherwise (checking without adding, or adding without
checking) makes no sense.
Wietse
