To: davidel@xmailserver.org [Fwd: Returned mail: see transcript for details]

To: davidel@xmailserver.org [Fwd: Returned mail: see transcript for details]

[David]

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Your email address seems to be broken ;)

I tried from different networks.

rcpt to:<davidel@xmailserver.org>
550 Relay denied

-d


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The original message was received at Sun, 8 Apr 2001 14:48:51 -0700
from david@Huntington-Beach.Blue-Labs.org [208.179.59.198]

   ----- The following addresses had permanent fatal errors -----
<davidel@xmailserver.org>
    (reason: 550 Relay denied)

   ----- Transcript of session follows -----
... while talking to host1.xmailserver.org.:
>>> DATA
<<< 550 Relay denied
550 5.1.1 <davidel@xmailserver.org>... User unknown
<<< 503 Bad sequence of commands

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From: David <david@blue-labs.org>
To: Davide Libenzi <davidel@xmailserver.org>
Subject: Re: goodbye
Date: Sun, 08 Apr 2001 14:48:50 -0700
Message-ID: <3AD0DCC2.1020901@blue-labs.org>

Most MTAs already have capabilities developed to grant or revoke relay 
access based upon IP or host mask.

-d

Davide Libenzi wrote:

> I had the same problem of shifting down along the mail chain the knowledge of
> the incoming IP address.
> We develop VirusScreening and ContentFiltering MTA ( and appliances ) that
> usually goes in front of customers MTA.
> By putting our MTA in front of the customer MTAs chain We hide the peer IP
> address to MTAs that comes next in the mail chain.
> Our MTA uses a new ESMTP command :
> 
> XRMTIP remote-ip-address
> 
> to let customers MTA to know the remote IP address and let them to take all
> relay and generic permissions decisions about the mail path.
> We're going to distribute patches for most common MTAs like qmail, sendmail,
> exim, XMail and postfix.
> The patch rely on the presence of a file ( /etc/xrmtip.hosts ) that list the IPs
> from which the XRMTIP command sould be accepted.