On Thu, 29 Jul 1999, James Dehnert wrote:
>
> Here is a problems that came up here. We had a user that we wanted to set up
> so...
>
> 1) He could send mail to anyone
> 2) Only local folks could send mail to him
> 3) Externally it would look as if he did not exist
He could send mail to *ANYONE*, including external users, but they
could not send back to him? Sounds like something a potential spammer
might like. In any case, I would only let him send to people he was
willing to receive mail from.
>
> Alias file manipulation didn't work for obvious reasons, but we have since
> decided that such protection would be perfect for hiding internal group aliases
> ( like "all" which we don't have, but you get the picture )
>
> Has anyone tackled this?
>
> Thanks,
> Zeke
>
> Philip Hazel wrote:
> >
> > On Thu, 29 Jul 1999, Andromeda wrote:
> >
> > > As we all know, Unix systems run their daemons under various users (root,
> > > nobody etc). Since any of such users can be used to spam systems (because
> > > they appear to be local users, and hence CAN send email), I am wondering if
> > > there is a way where I can set up a router or director which will allow
> > > those users to ONLY send email within the local host, i.e
> > > nobody@??? can send email only to users within the host itself.
> >
> > Not so odd.
> >
> > FAQ Q9802.
>
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