Custom cookies in IE—How do I undo permanently-blocked cookies?

I’ve recently begun using the Adavanced Privacy settings, and I love them. However, I’ve a slight issue: A couple of times when still learning the ropes (with Yahoo! Mail and Google to be precise), I’ve blocked the cookie with the “Block All Future Cookies” box checked. Even though I regularly clear my cookies, I cease to see a dialog box at the site which I previously blocked-with-the-box-checked even after changing my cookie-handling settings.

Might anyone know how I can accept cookies from sites I have previously blocked with this option checked? Many thanks.

Tools -> Internet Options -> Privacy -> Sites. Find the site you want under the list (it may be a bit hard to find… for example, the site may have been added as yahoo.com or it may appear as mail.yahoo.com or www.yahoo.com. Then, either explicity set cookies to be allowed for the site or simply remove the site’s entry from the list. Then the next time you visit the site, you’ll be asked about the cookies again.

Alternatively, when you visit a blocked site, a little icon composed of an eye and a stop sign should appear in the lower right part of your screen (as long as the status bar is visible). Double-click on that and you can manage the site’s cookies directly from there.