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On Sunday 23 November 2003 16:58, Matthias F. Brandstetter wrote:
> Hi all,
>
> I have the following configuration:
>
> Internet --> Linux firewall --> DNAT (25) --> MS Exchange server
>
> In words: All mails arriving on this domain are port forwarded via a Linux
> iptables firewall to an Exchange server. Now I want to insert SpamAssassin
> to this queue and thought of some kind of a SMTP mail proxy.
>
> I don't want to install a full mailserver, only a little tool which I can
> use on the firewall to:
>
> 1.) receive the mail
> 2.) queue it through SpamAssassin
> 3.) forward filtered mail to the Exchange server
>
> nothing more. Do you know of such a tool? And if not and if I have to use a
> full mailserver, which one should I use for that? Please remember, I
> really want an easy setup here...
I do something like this.
IPtables traps all outgoing SMTP traffic and redirects it to a local instance
of qmail. It, along with qmail-scanner and f-prot/spamassassin check the
message and relay it along.
If anything was more than a no brainer it was the iptables setup
($IPT -t nat -A PREROUTING -i $LANIF -s ! ${ip} -p tcp --dport ${sprt} -j DNAT
- --to-destination ${ip}:${dprt})
If you want all mail to be routed to a specific machine add
:exchange.server
in /var/qmail/control/smtproutes
Or install webmin, it's qmail admin section is really good.
- --
Mike Williams
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