My isp just mailed this warning. It is the virus I was getting as I received all the subject titles that are listed below.

Dear Nauticom customer

As a courtesy to you, we are advising that you be aware of Internet Virus/Email Worm,
W32/Sober-N.
W32/Sober-N is a mass-mailing worm that
emails an attachment to addresses gathered from a compromised computer. The
email may be in either English or German.

Possible Subjects

Re:Your Password
Re:Registration Confirmation
Re:Your email was blocked
Re:mailing error
Re: [blank]