It’s a scam. It is safer for you and you are better off not opening e-mails from someone you don’t know. You know those e-mails that say ‘You are My Friend’ and ‘If you Love God’ or ‘If you Don’t send this You’ll have bad luck” and then tell you to forward to 10 friends including me? They are playing on emotions don’t do it. It is set up so that every time the e-mail is forwarded to someone ‘they’ are getting that person’s e-mail address that it’s being forwarded to. And they just got yours from whoever forwarded it to you.
Also when you forward e-mails delete the e-mail address it came from and bcc when you have more than one person you are sending an e-mail to.