Don't let the virus writers fool you. A recent variant of the MyDoom virus is sending out "technical support" emails or what seems like return notices.
An example of the message body:
Dear user of [domain name],
Your e-mail account has been used to send a huge amount of junk email
messages during the recent week.
We suspect that your computer was compromised and now runs a trojaned proxy
server.
We recommend that you follow the instructions in order to keep your computer safe.
Virtually yours,
[domain name] support team.
The [domain name] is replaced by the end of your email address. This is especially confusing when your email address is a hotmail or yahoo account - it is almost too convincing.
Then attached with this email is a file called [domain name] (which as a .com will run as an executable), or similarly [user]@[domain name].
More information can be found here:
MyDoom.N Raised to Amber Alert
And for the removal tool: