I received 2 emails in my Yahoo mail, and there were attachments, attached but my?

Yahoo mail wouldn't let me open the pictures. I clicked on "properties" and it went to a screen that said "general", but under everything it said none! I am new to Yahoo mail, used to use my ISP address, and I am on dial-up so my connection is very slow, but that never stopped me being able to open pictures/attachments in my ISP email. Please if anybody knows how to fix, would appreciate...... :)