Can't click 'Null Sender' box for SMTP Blocking

Problem reported by kevind - 1/3/2018 at 10:22 AM

Resolved

Log in as Admin on SM15.x
Go to Security -> Antispam Administration
Null Sender -- can't click the checkbox under 'Enable for Incoming SMTP Blocking'

Would like to be able to check this box to stop spam like this:

MIME-version: 1.0
Content-type: text/html
To: mr.green@example.com
from: .*PaulRodney*. <A6QPL@MOO52J2Z3V.nelottery.com>
Subject: ~This**Hormone**Is~~" Testosterone's***Twin "
Date: Wed, 3 Jan 2018 06:11:23 -0500
Message-ID: <1463cc4776e548d79af07c23bf33efc6@com>

Thanks,
Kevin

7 Replies

Reply to Thread

Employee Replied

1/3/2018 at 10:41 AM

Employee Post

Hi Kevin. I'm seeing this too. I'll get this over to the developers.

kevind Replied

1/3/2018 at 5:44 PM

Thanks, Rod!

kevind Replied

1/18/2018 at 7:15 AM

Just saw some spam this morning that would have gotten blocked with this check. If the developers have a custom build, we'd be glad to test it for you before you release it. Thanks!

kevind Replied

1/21/2018 at 1:39 PM

So excited for this fix! Just went through 7000+ spam messages on server from the last 48 hours and 6000+ had null sender! Here's a sample:

Return-Path: <>
Received: from 6hostlodge.com (162-144-123-96.unifiedlayer.com [162.144.123.96]) by mail.example.com with SMTP;
   Sun, 21 Jan 2018 14:43:52 -0500
MIME-version: 1.0
Content-type: text/html
To: user@example.com
from: DerekEvans<Today@eeoo.co>
Subject: Are***your**FAT**CELLS***deaf?
Date: Sun, 21 Jan 2018 14:24:31 -0500
Message-ID: <b24efd36c1734bfcac1dec849fac6c74@com>
X-Exim-Id: b24efd36c1734bfcac1dec849fac6c74
X-SmarterMail-Spam: Null Sender, Commtouch 20 [value: Confirmed], DKIM_None, Custom Rules []

I'm sure many others will benefit from this also. Just having an extra 10 points for null sender will score the message high enough to get blocked during SMTP, saving tons of resources on the server. In this case, the server would process 3000 fewer messages/day.

Kevin

Matt Petty Replied

1/22/2018 at 2:42 PM

Employee Post

Hello,

I've implemented this feature request in SmarterMail 16 and will be seen in the next minor build. It was not originally intended for this filter to scan SMTP and thus we disabled the checkbox, hence the inability to check the box. Since this is a feature request I've implemented it directly in SmarterMail 16, this change is not lightly made as it required some moderate backend changes.

Matt Petty Senior Software Developer SmarterTools Inc. www.smartertools.com