[95830] in North American Network Operators' Group
Re: Blocking mail from bad places
daemon@ATHENA.MIT.EDU (James R. Cutler)
Thu Apr 5 16:38:56 2007
Date: Thu, 05 Apr 2007 16:30:21 -0400
To: <nanog@nanog.org>
From: "James R. Cutler" <james.cutler@consultant.com>
In-Reply-To: <005b01c777b9$8ab03f90$174f7d40@home.glassey.com>
Errors-To: owner-nanog@merit.edu
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Todd makes my point exactly. As he notes, the rejection message
tells me that the message was rejected by some system. It does not
tell my why it was rejected. Thus, just like this message, it adds
more to the noise to signal ratio!
Cutler
At 4/5/2007 12:28 PM -0700, todd glassey wrote:
----- Original Message -----
From: <mailto:james.cutler@consultant.com>James R. Cutler
To: <mailto:nanog@nanog.org>nanog@nanog.org
Sent: Thursday, April 05, 2007 12:08 PM
Subject: Re: Blocking mail from bad places
At 4/5/2007 08:38 AM -0700, Thomas Leavitt wrote:
One problem with the "bounce" solution is that <snip/>
==========================
So, I (Cutler) add:
And, even the best-intentioned bounce messages often give lots of
data, but no information, thus increasing the noise to signal
ratio. For example, Paul most likely knows what the following means
to him. To me it just means I can't send mail to Paul.
Except that this message tells you why you cant send mail to Paul -
because Paul's system refused it, not because Paul's system didnt
exist or that Paul's address was bad.
>This message was created automatically by mail delivery software.
>
>A message that you sent could not be delivered to one or more of its
>recipients. This is a permanent error. The following address(es) failed:
>
> paul@vix.com
> SMTP error from remote mailer after RCPT TO:<paul@vix.com>:
> host sa.vix.com [204.152.187.1]: 553 5.7.1 Service unavailable;
> Client host [209.86.89.61] blocked using reject-all.vix.com; created / reason
>
>------ This is a copy of the message, including all the headers. ------
-
James R. Cutler
james.cutler@consultant.com
-
James R. Cutler
james.cutler@consultant.com
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<font size=3>Todd makes my point exactly. As he notes, the
rejection message tells me that the message was rejected by some
system. It does not tell my why it was rejected. Thus, just
like this message, it adds more to the noise to signal ratio!<br><br>
<x-tab> </x-tab>Cutler<br>
<br>
At 4/5/2007 12:28 PM -0700, todd glassey wrote:<br>
<br>
</font>
<dl>
<dd>----- Original Message ----- <br>
<dd>From:</b> <a href="mailto:james.cutler@consultant.com">James R.
Cutler</a> <br>
<dd>To:</b> <a href="mailto:nanog@nanog.org">nanog@nanog.org</a> <br>
<dd>Sent:</b> Thursday, April 05, 2007 12:08 PM<br>
<dd>Subject:</b> Re: Blocking mail from bad places<br><br>
<dd>At 4/5/2007 08:38 AM -0700, Thomas Leavitt wrote:<br><br>
<dd>One problem with the "bounce" solution is that
<snip/><br>
<dd>==========================<br>
<dd>So, I (Cutler) add:<br><br>
<dd>And, even the best-intentioned bounce messages often give lots of
data, but no information, thus increasing the noise to signal
ratio. For example, Paul most likely knows what the following means
to him. To me it just means I can't send mail to Paul.<br><br>
</dl> <br>
<font face="Times New Roman, Times" size=2>Except that this message tells
you why you cant send mail to Paul - because Paul's system refused it,
not because Paul's system didnt exist or that Paul's address was
bad.<br><br>
<br>
</font><blockquote type=cite class=cite cite="">
<dl>
<dd><font size=3>This message was created automatically by mail delivery
software.<br><br>
<dd>A message that you sent could not be delivered to one or more of
its<br>
<dd>recipients. This is a permanent error. The following address(es)
failed:<br><br>
<dd> paul@vix.com<br>
<dd> SMTP error from remote mailer after RCPT
TO:<paul@vix.com>:<br>
<dd> host sa.vix.com [204.152.187.1]: 553 5.7.1 Service
unavailable; Client host [209.86.89.61] blocked using reject-all.vix.com;
created / reason<br><br>
<dd>------ This is a copy of the message, including all the headers.
------</blockquote><br><br>
</font><x-sigsep><p></x-sigsep>
<dd><font face="Courier, Courier" size=3>-<br>
<dd>James R. Cutler<br>
<dd>james.cutler@consultant.com<br><br>
</font>
</dl></body>
<br>
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<font face="Courier, Courier">-<br>
James R. Cutler<br>
james.cutler@consultant.com<br>
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