As promised, we’ve started to roll out unlimited email storage to Yahoo! Mail users worldwide today. When it hits your account, you’ll notice the storage meter has disappeared — meaning, you just don’t have to worry about deleting old messages ever again!
As a reminder, while we wish we could simply flip a switch and "unlimit" everyone at once, we’ll be rolling this out over a few months to facilitate a smooth transition. Thanks for your patience.
Vice President, Yahoo! Mail