With Yahoo! Mail, you can easily create a large number of disposable email addresses that all use the same simple pattern: yourbasename-keyword@yahoo.com
You choose your unique base name (yourbasename), composed of a series of letters and/or numbers. Once you have the base name set, you can create up to 500 disposable addresses, each using a different keyword of your choice. For example, if you chose dairyman88 as your base name, you can create dairyman88-ebay@yahoo.com, dairyman88-mybank@yahoo.com, and so on.
Messages sent to these addresses go to either your Inbox, or to one of your personal folders--your choice, each time you create an address.
NOTE: You can’t use your Yahoo! ID either for your base name or as a keyword. This helps prevent anyone from figuring out your real Yahoo! Mail address from your disposable addresses.
If any of your disposable email addresses starts getting spam, simply delete that address from your account. Future messages sent to the deleted address bounce back to the sender instead of filling up your Yahoo! Mail account.
Ask Other Yahoo! Mail Users