In the RedHat distribution, it comes pretty much "locked down" (doesn't
permit relaying unless you want it to). Its all controlled by the 
/etc/mail/access file (which is described in
/usr/doc/sendmail/README.cf).

"Joshua S. Freeman" wrote:
> 
> OK... provisionally, I'm OK with that solution...
> 
> I do have a question though:  how do I lock down smtp services on the
> linux box if I move smtp services there (for users using clients from
> other networks...)
> 
> Thanks,
> 
> J.
> 
> On Tue, 8 Feb 2000, Bruce Dawson wrote:
> 
> > The easiest solution?
> >
> > Move all your mail services OFF the Mac and onto the Linux box. Set the
> > Linux box to be the Mail server for the domain (by changing the MX
> > record).
> >
> > Other solutions are more involved.
> >
> > "Joshua S. Freeman" wrote:
> > >
> > > OK.. now that we've got pop working on 199.232.38.4 (a linux box known as
> > > monica.threeofus.com and aliased as pop3.threeofus.com) it seems the
> > > following scenario pertains:
> > >
> > > all mail for *.threeofus.com is being spooled on the machine that handles
> > > DNS for .threeofus.com... that's 199.232.38.2, aka joshua.threeofus.com
> > > and aliased as mail.threeofus.com and pop.threeofus.com...
> > >
> > > the problem is that mail for [EMAIL PROTECTED] is bouncing UNLESS
> > > that username exists in the accounts list on the mail server on the mac
> > > (199.232.38.2)... i have a bunch of users who only read their mail using
> > > pine on the linux box, 199.232.38.4...
> > >
> > > basically, here's what i'd like to set up:
> > >
> > > dns for threeofus.com should be served by macDNS on the mac at
> > > 199.232.38.2
> > >
> > > I want smtp for client users (non-*nix clients) to use mail.threeofus.com,
> > > aka 199.232.38.2 (Eudora Internet Mail Server)... there's no way to turn
> > > off pop service with EIMS, so even though pop service will be ON on
> > > 199.232.38.2 (the mac, aka, pop..threeofus.com), I want ALL pop
> > > activity/incoming mail for [EMAIL PROTECTED] to be spooled on the
> > > linux box, 199.232.38.4 aka pop3.threeofus.com so that:
> > >
> > > a) nothing bounces
> > > b) both pine users and remote client users can get their mail for their
> > > account @threeofus.com
> > >
> > > PLEASE HELP ME UNTANGLE/CONFIGURE THIS MESS!
> > >
> > > Thanks!  ;-)
> > >
> >
> 
>          -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
>            Joshua S. Freeman | preferred email: [EMAIL PROTECTED]
>                    pgp public key: finger [EMAIL PROTECTED]
>                           http://www.threeofus.com
>                  -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
> 
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