On Mon, 3 Jun 2013, David F. Skoll wrote:

On Mon, 3 Jun 2013 14:28:36 +0200
Matus UHLAR - fantomas <uh...@fantomas.sk> wrote:

you should look at Received: headers to see who passed the mail to
you and complain to abuse@ there. If the mail came from nacha.org, the
ab...@nacha.org is the right place to send complaints..

There were no Received: headers in my samples.  They were directly injected
by compromised Windows boxes.

Maybe the lack of Received: headers could be used as the basis for an SA rule.
How many legit MTAs are there that don't add Received: headers? Hopefully none.


--
Dave Funk                                  University of Iowa
<dbfunk (at) engineering.uiowa.edu>        College of Engineering
319/335-5751   FAX: 319/384-0549           1256 Seamans Center
Sys_admin/Postmaster/cell_admin            Iowa City, IA 52242-1527
#include <std_disclaimer.h>
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