On 9/6/2010 7:49 PM, Noel Jones wrote:
On 9/6/2010 6:27 PM, Alex Brown wrote:
I'd like to know what configuration option within Postfix I
can use to block this spam.

The mail is addressed to users at a hosted domain on my server
and it's being relayed by a trusted spam filtering server.
That domain, domain1.ca, has spam filtering turned off based
on the owner's request. The addresses on my server are not the
actual intended recipients. Those addresses are just being
used to turn my server into a relay. I've listed an example of
one of the spam messages below but I'm particularly interested
in the following section:

named_attribute: dsn_orig_rcpt=rfc822;b...@hosteddomain1.ca
original_recipient:
done_recipient: bradba...@anotherdomain2.ca
named_attribute: dsn_orig_rcpt=rfc822;la...@hosteddomain1.ca
original_recipient:
recipient: lrobert...@anotherdomain3.com

You seem to be under the mistaken impression the spammer controls the
forwarding.

Looks as if brad and laird have configured their hosted domain to
forward mail to their main accounts. If you allow folks to forward,
sometimes there are consequences.



Thank you very much for your help, Noel.

I totally forgot about the fact that they had forwarding set up. That indeed was the cause of the issue.

I also apologize for sending a copy of spam to the list.


Alex


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