Bad kids using my email address for phising?

I opened my email account this afternoon and noticed 4 messages like this, "Delivery Status Notification (Failure)‏" I opened them and they had some fishy looking attachments and it looks like they were all just the same phising email being forwarded from MY EMAIL ACCOUNT OMGGGGGG

Q u o t e:
--Forwarded Message Attachment--
From: [email protected]
To: RANDOM EMAIL THAT APPARENTLY DOESN'T EXIST HERE (removed)
Subject: World of Warcraft -- Account Issue‏‏
Date: Thu, 8 Jul 2010 06:34:15 +0800









***Notice of Account Will Closure***

Reason for Closure: Terms of Use Violation -- Exploitative Activity:
Unauthorized Cheat Programs ("Hacks")

This account Will closed because one or more characters were identified using
an unauthorized cheat program, also known as a

"hack." These programs provide character benefits normally not achievable in
the World of Warcraft. Such benefits include, but are

not limited to, increased speed, teleportation, or running through
walls/boundaries. Use of these unauthorized programs harm the

game environment because they offer an unfair advantage over other players
and superscede the intended limits of the game.

Even if this behavior is the result of a third party accessing the account
instead of the registered user (for example, a friend,

family member, or leveling service) then the account can still be held
responsible for the penalty because of the impact it had on

the game environment.

In order to keep this from occurring, you should immediately verify that you
are the original owner of the account.
To verify your identity please visit
the following webpage: http://www.WorldofWarcraft.com/

We've found the above behavior is many times directly related to groups
responsible for compromising World of Warcraft accounts; we

take these issues very seriously. To better understand our position against
exploitative activity and the risks involved, please

review this article:
http://www.worldofwarcraft.com/info/basics/antigold.html

The exploitative activity that took place on this account violates the World
of Warcraft Terms of Use. We ask you take a moment to

review these terms at http://www.worldofwarcraft.com/legal/termsofuse.html.
Any recurring subscriptions on this account have been

suspended to prevent further monetary charges.

For any disputes of this action, please visit the Exploitative Activity FAQ
and Contact page here:

http://us.blizzard.com/support/article/exploitfaq

Regards,

Blizzard Entertainment
www.WorldofWarcraft.com

There was an alternate Email that I didn't recognize on my account info also... I changed all the info and whatnot and scanned my cpu. I use an authenticator, I'm safe right?