How to use the My Mail and My Inbox apps
If you are new to My Yahoo!, the My Inbox app is the default way to preview your email on My Yahoo!. My Inbox lets you preview recent messages from your Yahoo! Mail, Gmail, AOL Mail, Hotmail, and POP Mail accounts, all in one place.
If you are not new to My Yahoo!, My Inbox can replace your current My Yahoo!mail apps. To do so, add it by searching for My Mail in the content gallery as described here.
My Inbox displays email messages from all your email accounts together on the All tab, or you can view your individual email accounts separately on their own tabs. Each tab shows a list of email message headers that display the date, the subject, and who the message is from. Click on one of the headers to view that email message.
My Inbox is for previewing email only. Depending on the email provider, a compose, reply, or delete link may also be present.