Yahoo email users will soon have an easier way to send and receive documents because Yahoo is adding Dropbox capability, which can be used by anyone logged into his account.
By using the “Save to Dropbox” button, you can upload files directly from your computer and receive them instantly in Dropbox from your account. You can share, store and send files as attachments. The service is designed to be quicker and less cumbersome than using email attachments.
— Adapted from “How to Easily Use Dropbox with Your Yahoo Account,” Mansal Denton, Lifehack.