291388Re: Null sender address in NDR's
- Feb 14, 2013Am 15.02.2013 00:29, schrieb Rod Whitworth:
> On Thu, 14 Feb 2013 15:58:34 +0000, Viktor Dukhovni wrote:as in real world, there is less you can do against idiots
>> This has nothing to do with spam. One can just as easily send spam
>> as <malory@...> as one can as <>. The ISP can equally easily
>> track it down, since the Received: headers will contain the offending
>> IP address.
> I don't know if you are seeing the storm I'm seeing that works like
> Spammer sends mail to my domain using a target like
> <JIXnZQwb5@...> and of course that is not accepted at entry.
> However there are masses of idiots who accept and bounce and so I see:
> <UHpUaGeKa48@...> proto=ESMTP helo=<mail-pa0-f68.google.com>
> in bounce messages that did not originate in my domain.
>you may use dmarc, helps a little bit
> The spammer is hoping for his message to be bounced so that it looks
> like the spam came from an innocent domain.
> I aasume that the content is spam. I don't have time to probe messages
> that may even have malware involved.
> I wonder how many bounced messages are read at the falsely accused
however in my most spammed domain, i use an adaptive firewall
for blocking servers/bot ips ( beyond postscreen etc ), this keeps the
log clean, and free up cpu power for legal mail, but that isnt a concept
for everywhere, its more like last defense
> *** NOTE *** Please DO NOT CC me. I <am> subscribed to the list.
> Mail to the sender address that does not originate at the list server is tarpitted. The reply-to: address is provided for those who feel compelled to reply off list. Thankyou.
> This life is not the real thing.
> It is not even in Beta.
> If it was, then OpenBSD would already have a man page for it.
MfG Robert Schetterer
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