Am 15.02.2013 00:29, schrieb Rod Whitworth: > On Thu, 14 Feb 2013 15:58:34 +0000, Viktor Dukhovni wrote: > >> This has nothing to do with spam. One can just as easily send spam >> as <mal...@example.com> 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 > this: > > Spammer sends mail to my domain using a target like > <jixnzq...@witworx.com> and of course that is not accepted at entry. > > However there are masses of idiots who accept and bounce and so I see: > <uhpuagek...@witworx.com> proto=ESMTP helo=<mail-pa0-f68.google.com> > in bounce messages that did not originate in my domain.
as in real world, there is less you can do against idiots > > 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 > domain.... you may use dmarc, helps a little bit 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 > > R/ > > *** 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. > > Rod/ > --- > 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. > > Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Axel von der Ohe, Marc Schiffbauer Aufsichtsratsvorsitzender: Joerg Heidrich
