Disposable email addresses are SBC/Yahoo!'s answer to spam. They have the same functionality as an alias. Basically each account (primary and sub) get up to 500 DEA (disposable email addresses). You can go to your mail options tab for whichever account you wish to have a DEA on and set it up. You can add up to 500 DEAs and delete them as necessary. This is primarily for people who like to register at new sites but do not wish to give out her their actual email address.
