Robert Geller <[EMAIL PROTECTED]> wrote:
> > >
> > > username@domain@domain
> >[...]
> > > I am sure that you all concerned about this as I do because it makes your
> > > server an open relay to this trick .
> >
> >No, it doesn't.
[...]
> >In no circumstances will the message be relayed to the server which handles
> >mail for domain "bar".
> I think Nissim is correct. I have tested several qmail servers and this
> does happen.
No, he is incorrect. The example you sent me in private mail doesn't show
this happening either. I have yet to see the logs of a single instance of
this form of relaying being allowed to happen through a qmail server.
Sending mail to <[EMAIL PROTECTED]@baz.net> will be accepted by qmail if baz.net is
in rcpthosts. If it's local, qmail will try to deliver it to local user
"[EMAIL PROTECTED]" -- qmail knows the difference between a local recipient and a
remote recipient, so it won't try to send this on to the MX for bar.com.
If baz.net is in rcpthosts, but not in locals or virtuals, qmail will then
forward the whole thing on to the primary MX for baz.net. If this is what is
happening, it's not (unauthorized) relaying at all, and doesn't involve
bar.com at any point.
Charles
--
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Charles Cazabon <[EMAIL PROTECTED]>
GPL'ed software available at: http://www.qcc.sk.ca/~charlesc/software/
Any opinions expressed are just that -- my opinions.
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