More options for mail
I would like to have one more option in the "sort" section. Organize messages by "unread" so that I can push all my unread messages to the top.
I would like to have mail filters based on incoming addresses. I can set the default for those incoming mail addresses as read. I can ignore unimportant messages from someone. Refer to google mail's way to do this.

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C. R. commented
don't know if you're using the mobile app or the webmail on a desktop, but the desktop webmail has a Sort option menu on the right end above the messages, and 1 option is to 'sort by unread', and another is 'sort by sender'. geez folks, click around a bit, and try reading the https://help.yahoo.com/kb/new-mail-for-desktop page.