Spam Blocker False Positives

netstepinc

Verified User
Joined
Jul 2, 2006
Messages
75
Location
Seattle, WA Area
Some of my clients are experiencing problems when receiving mail from
@verizon.net or @hotmail.com addresses.

I have one example where a friend of mine tried to send a message to one of my clients on the SpamBlocker protected server. The message was bounced back to her, then she tried to forward it to me and bounced again.

"forged verizon mail" is given as the reason, but it's not forged.
I noticed Yahoo is in the X-mailer line, but the sender is not
consciously using any sort of Yahoo product/system.

I need to prevent false positives like this.
Do you have any ideas?

NOTE: NAME, USERNAME, MY-IP and SB_server.com have been substituted for real email addresses and IPs to protect the innocent.

------------------------------ SECOND BOUNCE WHEN SENT TO ME---
72.3.MY.IP does not like recipient.
Remote host said: 550 Forged Verizon Mail, not sent from your account.
Giving up on 72.3.MY.IP.

------------------------------ REJECTION MESSAGE BELOW-----------
Return-Path: <username@verizon.net>
Received: (qmail 32205 invoked by uid 60001); 3 Oct 2007 00:35:03 -0000
X-YMail-OSG: ML1LT.MVM1nED3Y.zAesQGjY9nP2LwBcJrNHXEi2WfqjAedO
Received: from [71.121.149.199] by web84106.mail.mud.yahoo.com via HTTP; Tue, 02 Oct 2007 17:35:01 PDT
X-Mailer: YahooMailRC/651.50 YahooMailWebService/0.7.134
Date: Tue, 2 Oct 2007 17:35:01 -0700 (PDT)
From: NAME <username@verizon.net>
Subject: Problem with email
To: NAME <username@SB_server.com>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="0-477425170-1191371701=:31984"
Message-ID: <170919.31984.qm@web84106.mail.mud.yahoo.com>

--0-477425170-1191371701=:31984
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
 

nobaloney

NoBaloney Internet Svcs - In Memoriam †
Joined
Jun 16, 2003
Messages
26,119
Location
California
Some of the checks in SpamBlocker3 are a bit too aggressive: to resolve the problem remove the sections for forged email from these senders:

Forged Yahoo mail
Forged hotmail mail
Forged MSN mail
Forged AOL mail
Forged Netscape Mail
Forged Comcast Mail
Forged Verizon Mail
Forged Paypal Mail
Forged Prodigy Mail
RoadRunner Mail
Forged RoadRunner Mail
Forged Gmail

Jeff
 

jjbakker

Verified User
Joined
Apr 28, 2006
Messages
55
I guess that's an workaround for the moment? is there also a real solution?
 

nobaloney

NoBaloney Internet Svcs - In Memoriam †
Joined
Jun 16, 2003
Messages
26,119
Location
California
You can revert to SpamBlocker2.

I should have a new version of SpamBlocker3 out soon.

Jeff
 
Top