From: motty.cruz (motty.cruzgmail.com)
Date: Fri Jun 11 2010 - 09:40:32 CDT

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

From: owner-postfix-userspostfix.org
[mailto:owner-postfix-userspostfix.org] On Behalf Of Jeroen Geilman
Sent: Thursday, June 10, 2010 4:02 PM
To: postfix-userspostfix.org
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
different domains.

Using postfix 2.6.

Thanks,

motty

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.

J.

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

To: userobscure.com

Subject: Returned mail: see transcript for details

The original message was received at Thu, 10 Jun 2010 01:28:19 -0700 (PDT)
from [124.217.198.141]

   ----- The following addresses had permanent fatal errors -----
<erichanewsguy.com>

    (reason: Can't create output)

   ----- Transcript of session follows ----- 550 5.0.0
<erichanewsguy.com>... Can't create output

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]