Cannot log into Yahoo mail or other yahoo sites

(1) Re-check your mail ID and password.
(2) When you last set your password, perhaps your keyboard was inadvertently in caps-lock mode?
(3) delete any old cookies or super-cookies (LSO's = Local Shared Objects) that may mis-identify your computer to Yahoo.com
clear cookies: Tools >Clear Recent History > Cookies
clear super-cookies: delete *.sol files in
C:\Documents and Settings\User\Application Data\Macromedia,
where "User" is replaced by your login name.
(4) clear your browser "Form and Search" history, which will store your (incorrect) password, and supply it to Yahoo.com without telling you its doing so - the browser thinks its cleverly "helping" you remember a password.

whenever you do delete cookies or history it happens ......then every time you have to give ur username and password and use.

No, Yahoo.com is up and I'm getting emails.
Clear your browser cookies and history by pressing Ctrl+Shift and Delete buttons then try again to log in Yahoo.com

No. Yahoo Mail, Google or Gmail are accessible here in our end.

Try to access Yahoo Mail in different internet browser (e.g. Firefox, Opera). If the Yahoo page loads up, then the problem has something to do with the current browser that you are using. You may clear the cookies and cache of your browser and see if that will work. Here's how:

* For Internet Explorer:

1. Run Internet Explorer and click on 'Tools' menu.
2. Go to Internet Options and locate the Browsing History section.
3. Click the 'Delete' button and delete the Temporary Internet Files, Cookies and History.
4. Close the Internet Explorer and re-open it.
5. Access your e-mail.

* For Mozilla Firefox:

1. Run Firefox and hit 'Tools' menu.
2. Go to 'Clear Recent History' and click the drop-down arrow for 'Time range to clear'.
3. Select 'Everything' and then click the line beside details.
4. Check browsing & download history, form & search history, cookies, cache.
5. Click "Clear Now" button.
6. Close and re-open Firefox.
7. Access your e-mail.

* For Safari:

1. Open the Safari.
2. Click the Safari menu (right beside the Apple icon) and select "Empty Cache".
3. When asked "Are you sure you want to empty the cache?", click "Empty".
4. Click the Safari menu (right beside the Apple icon) then go to "Preferences".
5. From the security dialog box, click "Bookmarks".
6. Click on "Show Cookies" button and then hit "Remove All" button.
7. Select "Done".
8. Access your email.

Thank you and good luck!

The problem is possibly caused by your Internet browser and not with your yahoo account. You need to clear the cookies and internet files to resolve the problem. Here's how:

Clear Cookies and Internet Files

* For Internet Explorer version 6
1. Open IE6 > Tools > Internet Options.
2. Click the Delete Cookies button and Delete History.
3. Click on OK > Close and re-open your IE6.
4. Try accessing your e-mail account.

* For Internet Explorer version 7
1. Open IE7 > Tools > Internet Options.
2. Click the "Delete" button under the Browsing History option.
3. Delete the Cookies, Internet Files
4. Click on OK > Close and re-open IE7
5. Try accessing your e-mail account.

* For Mozilla FireFox
1. Open Firefox > Tools
2. Select "Clear Recent History"
3. Select Cookies, Cache, Browsing and Download History.
4. Close and re-open Firefox
5. Access your e-mail

Good luck!
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If this problem never happened before, you may try optimizing your Internet browser by clearing the Cookies, History and Internet Files. To do this, please follow the steps below:

* For Internet Explorer:
1. Run IE > Tools > Internet Options.
2. Locate the Browsing History portion and click the Delete button.
3. Delete the Cookies, Temporary Internet Files and History
4. Click on OK > close the IE.
5. Re-open IE > try accessing your Yahoo e-mail again.

* For Mozilla Firefox:
1. Run Firefox > Tools > Clear Recent History...
2. Click the drop-down arrow > select 'Everything'
3. Click on 'Clear Now' > close the Firefox.
4. Re-open Firefox > access your Yahoo mail.

Hope this helps you resolving the problem!

Check your internet connections and your Firewall settings. Clear your browser cache and cookies and everything. Go to Tools and then select Clear History or Clear Private Datas. Close your browser and then try again. Hope this could help..:-)

Try to clear all the cookies and temporary files and check if any firewall is blocking certain pages...

unblock the yahoo ads service and check if any firewall has been installed , once clear your browsing history like cache , cookies , temporary internet files.....

Call Yahoo Customer Care Number USA 1-844-414-4869