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Re: Blocking mail from bad places

  • From: Thomas Leavitt
  • Date: Sat Apr 07 15:56:00 2007
  • Openpgp: url=http://www.thomasleavitt.org/thomas.asc
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Here's what one of the messages my system produces:

Apr  7 12:02:26 tongs postfix/smtpd[15229]: NOQUEUE: reject: RCPT from
mail.middreut.com[208.61.243.195]: 454 Service unavailable; Client host
[208.61.243.195] blocked using dnsbl.cagreens.org; Whoops!  Please see
http://greens.org/delist and note your sending address is -->
208.61.243.195 <--.  Sorry.; from=<> to=<[email protected]> proto=ESMTP
helo=<exchange.middreut.local>

This provides a reasonable explanation... as long as you can read
English. If you want to talk about hard to understand: every time I post
to nanog, I get a bounce message from someone in Germany, in German.
About as much use as my bounce message is to someone who doesn't read
English.

... and why aren't bounce messages standardized in content and formatting?!?

Thomas

James R. Cutler wrote:
> 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.
> 
>> 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:
>>
>>   [email protected]
>>     SMTP error from remote mailer after RCPT TO:<[email protected]>:
>>     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
> [email protected]
> 

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