Yahoo offers a similar service and is the only reason I use them still (though of course all yahoo emails then get forwarded to gmail). Yahoo's implementation

Yahoo offers a similar service and is the only reason I use them still (though of course all yahoo emails then get forwarded to gmail). Yahoo's implementation gives you a secondary email address of the form [fakeemail]-*@yahoo.com where you get to add in anything after the dash and only email addresses you create are valid and will be sent to you. You can also delete these email addresses at any time. Also you're able to respond to emails from using these temp accounts so you don't have to worry about revealing yourself.