Warning: Norton just caught the W32.Mytob.V@mm worm which is rated HIGH risk in an email that came from newsletter@linkshare.com. The subject was “Hi”.

I dont think Linkshare has my main email address so pretty sure this is a spoofed header. Symantec Sucurity says: The W32.Mytob.V@mm worm sends email to addresses collected from the compromised computer. Be careful and make sure your virus protection is up-to-date!