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hi mates...

I am using Kerio 6.4.0 for messaging system.
One of my recipient gets the information of Computer on which Kerio is installed.Like, Local PC IP Address, complete FQDN of Computer,etc....
i deem it as security breach b/c anyone might misuse this information.

I paste the output below...

Delivery-date: Thu, 13 Mar 2008 01:25:09 -0800
Received: from [] (
by with esmtp (Exim 4.63)
(envelope-from <xxxxxx<_a.t_>>)
id 1JZjft-00032O-Pv; Thu, 13 Mar 2008 01:25:09 -0800
Received: from farazakhlaq ([])
by (Kerio MailServer 6.4.0);
Thu, 13 Mar 2008 12:36:35 +0500
Message-ID: <002001c884dc$f747ab80$6401a8c0<_a.t_>

If you review line number 9 and 10, it shows originating PC, hostname and IP Address.
I am running this Server on Windows XP SP2, hosting it on a private IP address(as obvious from output).Is there anyway to hide this information.



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Surely it's more of a security risk to:

A) Run an old version of the mailserver
B) Post this "privileged" information online


Pavel Dobry (Kerio)

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This is of course described in the manual: Look for "Hide local IP in Received headers".

Reading the manual is always worth to try. And searching this forums too.

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thanks for suggestions...i took an in-depth look at Kerio Administrator Guide, it has everything to satisfy my query..., i m using DNS to route email instead of SMTP server...which method is reliable...
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