On 06/11/2010 04:40 PM, motty.cruz wrote:
*From:* owner-postfix-us...@postfix.org
[mailto:owner-postfix-us...@postfix.org] *On Behalf Of *Jeroen Geilman
*Sent:* Thursday, June 10, 2010 4:02 PM
*To:* postfix-users@postfix.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?
I don't understand what you mean.
If spammers spoof the envelope sender, header_checks will not help you.
If spammers spoof the sender header, well, postfix doesn't look at From:
headers.
J.
From: Mail Delivery Subsystem [mailto:mailer-dae...@smtp.newsguy.com]
Sent: Thursday, June 10, 2010 1:28 AM
To: u...@obscure.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 -----
<eri...@newsguy.com>
(reason: Can't create output)
----- Transcript of session follows ----- 550 5.0.0
<eri...@newsguy.com>... Can't create output
