We occasionally get complaints from users that mail they send has two unknown attachments, usually named image001.wmz and image001.gif. When the attachments are viewed, they look like they could be used for bullets.
These are not caused by viruses, trojans, infections or anything nefarious. You do not need to run Detect & Repair. It simply means that you (or the sender) is using Word as the editor and have it configured to add a header, footer or otherwise customized the template. It can also mean you are using a stationery with a white or clear image.
Investigating the image
When you have an unknown image attached to a message, there are two things you can do to investigate. First, right click on the message and choose view Source. Look for images, HTML tags (such as background="cid:image001.gif or an img tag). This can give you an idea where the image is used.
For example, we can tell by looking at this code that the image is used for the background. We can also guess that the theme might have "Arctic" in the file name, based on the title tag.
<body bgcolor="white" background="cid:image001.gif@01CD3469.D1EB1F70" ><img src="cid:image001.gif@01CD3469.D1EB1F70" v:src="cid:image001.gif@01CD3469.D1EB1F70" v:shapes="_x0000_Mail" width="0" height="0" class="shape" style="display:none;width:0;height:0"><!--[if gte mso 9]><xml> <v:background id="_x0000_s1025" o:bwmode="white" o:targetscreensize="1024,768"> <v:fill src="cid:image001.gif@01CD3469.D1EB1F70" o:title="background_arctic" type="frame" /> </v:background></xml><![endif]-->
This piece of HTML is near the top of the source code and confirms the stationery that was used.
<meta name="Microsoft Theme 2.00" content="Arctic 011">
If you want to see the image (in the example above, its a 50x50 white image), open the message and use Save as to save it in HTML format. This will create an HTML file and a matching folder on your hard drive. Look for the image in the matching folder.
How to fix the template
Close Word and Outlook. Locate Normal.dot template file on your file system and rename or delete it. Word will recreate the normal template the next time you open it. (If you have macros in Word, rename the template.)
In Windows 7 or 8, type or paste %appdata%\Microsoft\Templates into the address bar of Windows Explorer to open the Template folder and delete or rename Normal.dot. In Windows XP, it's at %USERPROFILE%\Application Data\Microsoft\Templates
Beginning with Outlook 2007, the email template is NormalEmail.dotm. It's stored in %appdata%\Microsoft\Templates too.
You can also fix it by turning off Word as the editor (Outlook 2003 and earlier). This setting is in Tools, Options, Mail Format tab.
Small white or clear images may be added by your stationery. To check, go to Options, Mail and click on the Stationery and Fonts button. Are you using a theme?
Outlook 2003 is the only version that uses normal.dot as the email template. Previous versions of Outlook, when Word is used as the editor, use the email.dot template stored in C:\Program Files\Microsoft Office\OFFICExx\1033. Unfortunately, this causes stability issues (understatement!) and many, many users disable Word as the email editor in the older versions.
In order to stabilize Word as an email editor, Outlook 2003 uses the normal template, the same template Word uses. This helped to reduce crashes but the law of unintended consequences popped up: when certain Word add-ins were installed, users were always asked to save the template. It was confusing because they did not make changes to the template. See Tip 341: Save Normal.dot? for more information about this annoyance.
With the introduction of only one email editor (Word) in Outlook 2007, the email template was renamed NormalEmail.dotm. This template is also used for Outlook 2010 and up.