internal ip address

[alexbo at myself.com]

Thank you Denis for your reply.
I realize what you wrote, but it appears to me that exposing internal ip addresses may lead anyone to know what is my internal network structure:
the problem I am talking about is regarding an enterprise network, where various clients are involved in sending mail to the outer world.
Is there a way to hide those internal ip addresses ?
Regards,
Alex
> ----- Original Message -----
> From: "Denis Beauchemin" <Denis.Beauchemin at usherbrooke.ca>
> To: "MailScanner discussion" <mailscanner at lists.mailscanner.info>
> Subject: Re: internal ip address
> Date: Wed, 06 Feb 2008 08:30:30 -0500
> 
> 
> alexbo at myself.com a écrit :
> > Hi there,
> > my Linux server has MailScanner v4.65.3 with postfix v2.1.5
> > When, for example, I send a message from a pc whose internal ip 
> > address is 10.0.0.175 taking a look in the headers of outgoing 
> > mail I've seen the last header just before Message-ID to appear 
> > like that
> >
> > Received: from [10.0.0.175] (pc1 [10.0.0.175])
> > by smtp.vvv.net (Postfix) with ESMTP id 6EBF7A75C7
> >     for <aaa at mail.com>; Tue,  5 Feb 2008 14:16:09 +0100 (CET)
> >
> > Why the ip address of the sender is shown (twice) in square brackets ?
> >
> > My task is avoiding the outer world to know the internal ip of the sender...
> 
> Alex,
> 
> The IP addresses you use are non-routable.  That means nobody can 
> access your computers from the internet because no router will 
> allow them.  So don't worry about the whole world knowing about 
> your internal IP addresses.
> 
> Denis
> 
> --   _
>   °v°   Denis Beauchemin, analyste
> /(_)\  Université de Sherbrooke, S.T.I.
>   ^ ^   T: 819.821.8000x62252 F: 819.821.8045
> 
> 
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