[H-GEN] I hate SPAM

[Michael Anthon]

Well, to reply to myself....
I ended up going the way of setting up sendmail as an "mail firewall".
Changed my DNS to point to it and much to my own surprise managed to
configure Sendmail to prevent relaying from anywhere else but my LAN
without having a brain haemorrhage.  Then once the DNS had been
propagated I prevented M$ Exchange $erver from accepting connection from
anywhere but my LAN.  All seems to be happy.

Upon further investigation, I found a nice little web page that explains
how to configure various mail servers to prevent relaying, which is when
I gave up all hope of "fixing" Exchange Server.  It (V5.0) CAN NOT be
prevented from relaying, you can only block specific addresses or ranges
of addresses.  Ver 5.5 can be set up to prevent a relay, but I don't
particularly wish to upgrade since it's still beta.  Hopefully, somebody
will be able to fix the serial port speed on the IPCs, then I can put
the modem on that machine as well and get the NT box off the internet
completely.

I have noted that when I was getting this list at home, the mail would
occasionally be routed via my works mail server, which I thought was
really strange since there is no relationship between the two systems at
all.    Don't suppose anyone wants to take a stab at explaining this
behaviour ??

Regards
Michael Anthon

TAMS Systems

On Thursday, 7 May 1998 11:07, Michael Anthon [SMTP:anthonm at tams.com.au]
wrote:
> I know this may be a little off topic, and I don't really want to
start
> any OS/Mailer wars, BUT.....
> 
> I have become a victim of a SPAM attack (ie, someone using my server
to
> relay SPAM) at work.  I am running MS Exchange Server and have not yet
> figured out how to prevent it from being used for relaying.  I have
now
> blocked that particular domain, but that will not stop it from
happening
> again from another domain.
> 
> Now, I am looking at getting (sensible please) suggestions for
> solutions.  I can see the following possibilities...
> 
> 1. Configure MS Exchange Server to prevent relaying, if this is at all
> possible.  Does anyone else have to work with this monstrosity??
> 
> 2. Use one on my IPCs to run a decent mailer and set this to be the
> primary destination and configure it to prevent relaying.  Then
forward
> any mail for my domain to the MS Server. I have enough real IPs to do
> this and it's a simple matter to change the DNS entry.  I tend to
favour
> this solution, but it will probably take me a little while to
configure
> it.
> 
> 
> 
> Regards
> Michael Anthon
> 
> TAMS Systems
> 
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