Windows 7 Live Mail

I use a pop server and lately been receiving quite a bit of junk mail.
This junk mail may be in my inbox or junk mail box but all have something in common.
They are all addressed to me, have a header, have a subject but has no text nor attachments.
Only 3 evenly vertically spaced small boxes that can not be opened nor show any properties are present.
My safety option is set to high and real mail is NOT read as junk.
Not a big problem but just curious if my server may be doing this or a personal setting I've overlooked.
Sorry but I already got rid of 6 junks before posting this so will send a screenshot later.
Thank you for you consideration.

Thanks but my boxes are ALWAYS just 3 of them with no 'X' in them and are not jpg images.
Left click won't open them and right click displays no options at all.
It's weird and in all my years never encountered this type email action. Luckily just minor inconvenience.

Thanks for the replies. I do block senders and domains but haven't reported to my ISP. I'll try that.
Here is that screenshot I promised:

The only option with those squares is Select All and it highlights the whole text page.
There are 4 more greyed out options that can't be accessed:
Copy, Save Picture As..., Save Hi-Res Version... and Save Background As...also Select All mentioned up.
Details of properties of message:
Return-Path: <sdqsd@adobe.com>
Received: from fed1rmimpi111 ([68.230.241.187]) by fed1rmfepi203.cox.net
(InterMail vM.8.01.05.15 201-2260-151-145-20131218) with ESMTP
id <20151129194157.NDEO17971.fed1rmfepi203.cox.net@fed1rmimpi111>
for <nickgrana@cox.net>; Sun, 29 Nov 2015 14:41:57 -0500
Received: from adobe.com ([89.184.82.11])
by fed1rmimpi111 with cox
id nXhs1r0180EfVbM01Xhvna; Sun, 29 Nov 2015 14:41:56 -0500
Message-Id: <nXhs1r0180EfVbM01Xhvna>
X-CT-Class: Bulk
X-CT-Score: 5.00
X-CT-RefID: str=0001.0A020204.565B4462.001A,ss=3,sh,re=0.000,fgs=0
X-CT-Spam: 0
X-Authority-Analysis: v=2.0 cv=Y7cmRGiN c=1 sm=1
a=21xy07fEk6L3Bj3Gvpew1Q==:17 a=9cW_t1CCXrUA:10 a=qtqOOiqGOCEA:10
a=e5rL2GCSpYdrcn9_W0gA:9 a=NWVoK91CQyQA:10 a=21xy07fEk6L3Bj3Gvpew1Q==:117
X-CM-Score: 0.00
Received: from localhost (127.0.0.1) by adobe.com id hbdag816lt0a for <nickgrana@cox.net>; Sun, 29 Nov 2015 13:55:32 -0500 (envelope-from <sdqsd@adobe.com>)
From: =?UTF-8?B?ICAgICAgIDIwLzIwIFZpc2lvbiBGb3JtdWxhICAgIA==?=
Subject: =?UTF-8?B?ICAgIFJlc3RvcmUgWW91ciAyMC8yMCBWaXNpb24gSW4gNyBEYXlzICAg?=
Date: Sun, 29 Nov 2015 13:55:32 -0500
X-Originating-IP: 89.184.82.11
Content-type: text/html
X-Antivirus: AVG for E-mail 2016.0.7227 [4477/11088]
X-AVG-ID: ID4E3B4DDA-4554ECFF

I see it was seen by my AVG but disabling that does not affect what's happening.
Thanks again.

All service is provided by Bright House Networks. The details mentions Adobe.com but the ip address
89.184.82.11 is s3predictlabs7.com in Ukraine. Very fishy (phishy). This is getting more interesting.