Yves Kreis:
> >> Anyhow:
> >>
> >> Yes it is about postfix address rewriting (which can be done as well
> >> though sender_canonical_maps afaik).
> >
> > I wrote that Postfix address rewriting has no effect on
> > Postfix relay permissions.
>
> It has effect on the other server accepting the mail or not!
You need to learn the difference between "necessary" and "sufficient".
Postfix (sender) address rewriting may be NECESSARY for the remote
server to accept your mail, but it is not SUFFICIENT to create an
open relay.
To be an open relay, a system has to accept mail from any remote
client for any remote destination.
Wietse
