Mar 112012
 

Sometimes all you have to do is open an e-mail and malware is deployed.  Many times clicking a link in a spam message will cause malware to be downloaded to your computer.

You can stay ahead of the curve by checking the message header before you open an e-mail.

Message headers is information that travels with an e-mail and is chock full of information about where an e-mail came from. It doesn’t take long to zero in on the key information.  The Reply To field (if you clicked reply) is often a dead giveaway.  Looking at the routing information is another.

Previous versions of Outlook had a really handy tool to help you look at the message headers by selecting a message, right-clicking, and selecting Options from the contextual dropdown menu.  In Outlook 2010, Message Options are still there, you just have to create a shortcut manually.

Here’s how:

  1. Go to the File Menu
  2. Select Options.  This brings up the Outlook Options dialog box.
  3. Click on the Quick Access Toolbar (that’s where we will put the Message Options icon)
  4. In the Choose Commands From dropdown, select Commands Not in the Ribbon
  5. Scroll down to Message Options and select it
  6. Press the Add button.  Message Options will now appear in the Customize Quick Access Toolbar side.
  7. Click OK.

You will see the new Message Options icon in your Quick Access toolbar that appears at the top of Outlook.

Now you can select a message (but don’t open it!) and then click the Message Options icon to see the message headers.

Analysis of a span header will give you an idea of how to interpret the information.  If you are in the United States and see a domain name with a country extension like .cz (Czech Republic) or .ru (Russia), and the company does not have an office there, chances are very high that this is a nasty malware waiting to happen. 

If you have an Exchange Server-based network, ask us about installing a spam firewall.

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