Mailinglist Archive: opensuse (4208 mails)

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Re: [SLE] Re: Stopping open mail relay in SuSE standard server.
  • From: James Knott <james.knott@xxxxxxxxxx>
  • Date: Mon, 26 Jul 2004 08:58:31 -0400
  • Message-id: <4104FFF7.9020607@xxxxxxxxxx>
Carlos E. R. wrote:
The Sunday 2004-07-25 at 21:26 -0400, James Knott wrote:

More information is needed. What interfaces do you have? Is indeed
external mail coming in on that interface?

Does it consider the address that it comes in on?

Yes, due to the "mynetworks" setting.

Or the source address?


There is only one interface in use, connected to the firewall, via local
network. Beyond the firewall is an ADSL connection.

And in another message you mention that:

That I can't say. The firewall is a separate box, made by Symantec,
which I have no control over, other than asking for ports to be
forwarded. I guess I'll have to see what's actually in the packets and
enquire about the firewall being a proxy.

I haven't yet confirmed that there is a proxy, but considering what I've gone through, that's the only thing that makes sense.

That's what I thought. Postfix is seeing the email coming on an internal interface, and it is configured to trust everything coming on that interface. You could remove the interface from the "mynetwork" setting, but then, of course, all your intranet would be untrusted - perhaps not a bad thing in your case, I think you said something about a Exchange server behind.

No, there's no Exchange server. Currently, they're getting their mail via an external company and they're not happy with the performance.

Or you could give it another ip, perhaps a "real" one.

I was wondering what the solution would be, if the problem were caused by a proxy and it couldn't be turned off. One possibility, would be another IP. Are there other ways of dealing with a proxy?


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