Postfix

[Markus Trümper <markus.truemper@chevrolet.de>]

Hi,

I'm using postfix on Woody as a mail server. The server is located
in my DMZ, and I want my users to be able to send email without
creating an open relay. My network setup:

    192.168.1.0/24 (internal)
         |
     (firewall) --- Internet
         |
    192.168.4.0/24 (DMZ)

How do I tell postfix to
- accept email from 192.168.1.0/24 and 192.168.4.0/24 for
  relaying anywhere
- accept email from anywhere for relaying to 192.168.1.0/24 and
  192.168.4.0/24 and local delivery
- reject anything else, specifically relay requests from anywhere
  but 192.168.1.0/24 and 192.168.4.0/24 to anywhere but 192.168.1.0/24
  and 192.168.4.0/24?

Thanks in advance
  Markus

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| Dipl. Inf. Markus Trümper          |                            |
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