Are you using a Web-based email app (your ISP), or using a client app (Outlook Express, Outlook, etc.)? Either way, joepic is correct. Many email viruses come by attachments. There are exploits that can take advantage of your computer using different HTML code also, so you may want to scan with your favorite spyware app, adware app, and virus scanner. You can turn off HTML code with emails, and disply text only in most apps. Feel free to review the headers, but I don't think it will help much, as many email addresses are "spoofed" in the first place to send exploits. The only way this would help is if you have your own Web/Email server, then you can block the range of IP address from where it originated. Maybe a little too much info, but I think your computer will be fine. Hope you have a good virus scanner though.