Automatic Emails Being Sent Through My Account

[christyk1]

I have recently noticed emails randomly being sent out to folks in my contact list that I did not personally send out.  Here is an example of the source of one of these messages (note that I deleted the actual email addresses in the from and to):

From:

To:
Date: Fri, 27 Apr 2012 09:43:03 -05:00
Subject: (no subject)
X-Mailer: Verizon.Net Mobile v1

Get Rich! Make Money Fast and Get Rich Quick
http://www.wildhoney.tv/httpzdnew0cp2.php?opewnumberID=447

Fri, 27 Apr 2012 15:43:31
______________
Oh, the devil! were in a hurry, boy. lucas visszaaramlasok

            ------------------------------
            Sent using Verizon.net Mobile

I have current antivirus software on the computers that I use to access my email, and I don't think I have a virus.  I do also access my email from my iPhone.

I would very appreciate any thoughts on why this is happening and how to stop it.

Thanks,
Christy
       

[Finbar1]

This happened to me four month ago. Change your password and the spamming will stop. Your password was probably figured out by robo-software. Make it harder to crack.