Email security

Hello,

 

I had a question about email security that I hope the experts can answer.  Can I get infected just by opening an email in yahoo or hotmail?  I know not to click on any links or download any attachements, and I always check the addresses out before I even open the emails. 

 

I had an email from a legitimate address, with a normal subject line, but when I opened it, it was just junk...there was no link or attachments....just a bunch of pictures and some text.  I junked the email but just want to make sure I didn't get infected. Should I change my password and login details for my email account?

 

Thanks.