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From: motty.cruz (motty.cruzgmail.com)
Date: Fri Jun 11 2010 - 09:40:32 CDT
[mailto:owner-postfix-userspostfix.org] On Behalf Of Jeroen Geilman
Sent: Thursday, June 10, 2010 4:02 PM
Subject: Re: how to stop backscatter without check headers
On 06/11/2010 12:44 AM, motty.cruz wrote:
Is there a best way to stop backscatter spam without using check headers?
Traffic is too heavy to user check headers + we received email for three
Using postfix 2.6.
To stop backscatter spam, don't accept mail you cannot deliver.
That is a very smart answer, please pardon my stupidity.
Header_checks are trivially spoofed.
Spammers spoof the "from" and gets redirected to "user" in my domain? How do
you fight that?
From: Mail Delivery Subsystem [mailto:MAILER-DAEMONsmtp.newsguy.com]
Sent: Thursday, June 10, 2010 1:28 AM
Subject: Returned mail: see transcript for details
The original message was received at Thu, 10 Jun 2010 01:28:19 -0700 (PDT)
----- The following addresses had permanent fatal errors -----
(reason: Can't create output)
----- Transcript of session follows ----- 550 5.0.0
<erichanewsguy.com>... Can't create output