Spam email defeats Avast scanning

Avast Free Antivirus / Premium Security
1

I get spam emails, a lot.

I am on LinkedIn and get real mail from them.

The following mail, if put on the black list, will put all LinkedIn mail in spam.

Is there a way to flag this type of mail, and not real mail?
The way I see it would be to flag as suspicious emails that do not have the same email as sender and return path or something of the sort.

Return-path: NikolaiCellini@bresnan.net
Envelope-to: me@xxxxxxxxx.com
Delivery-date: Wed, 14 Nov 2012 07:50:47 -0800
Received: from [64.89.1.50] (port=56263 helo=64-89-1-50.static.wntpr.net)
by dprhcp131.doteasy.com with esmtp (Exim 4.80)
(envelope-from NikolaiCellini@bresnan.net)
id 1TYfEk-0001jX-Hd
for me@xxxxxxxxx.com; Wed, 14 Nov 2012 07:50:47 -0800
Received: from maild-be.linkedin.com ([216.52.242.162]) by pmx0.bresnan.net;
Wed, 14 Nov 2012 08:50:42 -0400
Sender: messages-noreply@bounce.linkedin.com
Date: Wed, 14 Nov 2012 08:50:42 -0400
From: LinkedIn Connections connections@linkedin.com
To: me me@xxxxxxxxx.com
Message-ID: 647810917.1628869.0758422456799.JavaMail.app@ela2-app9186.prod
Subject: Minna is now part of your network. Keep connecting…
MIME-Version: 1.0
Content-Type: multipart/alternative;
boundary=“----=_Part_5217591_9504669360.5547358756380”
X-LinkedIn-Template: accept_invite_snacked_A_01
X-LinkedIn-Class: INVITE-ACCEPT
X-LinkedIn-fbl: s-GVBGAQITB043M162FV737T1AQP2N7PF4P4PDPY-0S00ZO8FBML7XZF
X-OriginalArrivalTime: Wed, 14 Nov 2012 08:50:42 -0400 FILETIME=[A52180A5:DB413338]
X-Antivirus: avast! (VPS 121114-0, 12-11-14), Inbound message
X-Antivirus-Status: Clean
X-Antispam: spam (manual)

2

Marking that email as SPAM will not put all emails from LinkedIn into your Junk folder. It marks that particular email as SPAM in the national blacklist. It takes multiple users marking the same spam email as SPAM, before it will become blocked. One user clicking as SPAM will never block any SPAM ever.

3

Understood, and great if Avast gets feedback from manual marking of spam and can act if numbers are great enough.

I was talking about black listing this fake email results in all real emails to be blocked too.

Seems to me, the Avast mail filter is not going into great lengths to decipher email headers to find dubious ones.
The spoof technique used here is being used at large under Fedex, PayPal, UPS, USPS, Facebook, etc.

A dubious category does not even exist when scanning mails…

4

When selecting BLACKLIST, this only add’s the recipients email address to the local blacklist, for only blocking emails from that address only. I get these same LinkedIn SPAM emails also. The correct procedure is SPAM, then the statements you made have a chance of occuring.