I just got and set up my new iMac (first Apple - PC convert) last night. I tested it out by going online and using my Yahoo! email account. Woke up this morning and found out that all of my contacts had received phising email that raved about a website that they should visit. Each one was different. I subsequently sent out emails to all my contacts telling them not to click on the link and to delete the emails. I also changed the password on my Yahoo! email account. I have never had this happen on all of the PCs I have used. Another guy at work got an iMac a week or so ago and had the same thing happen a couple of days after he started using it. He has set up several email accounts but only the first was affected. He asked a computer savvy friend of his to check out the iMac and they found no viruses or malware involved. Before anyone asks, I only went through the initial setup on the machine and did not click on any MacDefender or similar install requests. Also I did not set up the account on the Mail application, I accesses the mail from Safari. My friend used the Mail application and his account was with AOL. Anyone else experience this? Any thoughts on if I should be worried of any further events? By the way - I love, love, love the machine. It took longer to get it out of the box than getting it up and running - never had that experience with a Windows machine. Thanks in advance for any help.