how do you empty your entire yahoo email mailbox? ?

The easiest way is to scroll to the bottom and click on the "check all"; This will select all the messages in your inbox by placing a check mark beside each one. Then, you hit the delete key below the "check all". This will delete all the messages that have a check mark beside them. However, if you have quite a few messages then you may need to do this procedure a few times, but it is a lot faster than doing them one by one.

I don't know if it was a fluke or not, but I went to the oldest email in my Yahoo mailbox, clicked on select all, and the next thing I saw - to my surprise - was 'do you want to delete all 2349 emails.' BINGO! The computer was in "stall" mode for awhile, but it beats one page at a time. Try it and see if it works for you.

On the side of the screen, where you click to go to inbox, there's a option to erase everything.

Go to mail , then click onto check all, then hit delete.