I signed up for yahoo mail before abou 6 months.also at that time i signe up for facebook too.but i can not sign in to yahoo mail but i can use facebook using it.

For your Yahoo Mail password, click the "I can't access my account" link on the Yahoo Mail sign-in page.
For your Facebook password, click the "Forgot your password?" link on the Facebook sign-in page.

Hi,
Right password insert then you open yahoo mail or facebook account.
If reset yahoo password then follow instruction.

https://help.yahoo.com/kb/password-sln2035.html

Or Facebook password reset then follow instruction.

https://www.facebook.com/help/213395615347144

Thanks.
Technical Support

One of the drawbacks of free email services is that they're easy to forget you have an account. Yahoo! Mail is just one of those free email services.

Say a few months go by, you've turned your attentions elsewhere, but you remembered you have a Yahoo! account and you want to check your email.

But after you log in, it informs you that your Yahoo! Mail is no longer active. What do you do?

Log in to your Yahoo! Mail account as usual.
A message will appear that says your account has been deactivated due to inactivity.

Reactivate your Yahoo! Mail by clicking on the "Reactivate Your Yahoo! Mail address" link that is located at the bottom of the page.

Sign into your account at least once a month to avoid automatic deactivation by Yahoo! in the future.

Connect aFacebook & Yahoo Account
One of Facebook's most convenient features is the ability to import contacts from any number of email programs to add your friends.
Yahoo Mail is one of the many services featuring built-in support for adding Facebook contacts, and connecting your accounts can be a quick, simple procedure.

Go to Facebook (facebook.com) and sign into your account.
Click on "Find Friends" in the top right corner of the screen.

Click on "Yahoo."
Enter your Yahoo Mail email address and click on "Find Friends."
Enter your Yahoo Mail log-in information if you aren't already signed into your Yahoo Mail in another window or browser tab.
Select the friends you wish to add to your Facebook from the list of contacts who already have signed up with Facebook and click "Add Friends."
Select the contacts you wish to send Facebook invites to from the list of contacts who have yet to sign up with Facebook and click "Send Invites."

I assume you wish to access email in a different Yahoo! Mail account. Yahoo! allows you to access only one account at a time. To sign in as a different user, you must first sign out from the account you are currently accessing.

To sign out from Yahoo! Mail, click on the "Sign out" link in the upper left corner of the web page:



Then go to the Yahoo! Mail page (http://mail.yahoo.com), and sign in with the new user ID and password.

See also this Yahoo! help pages:
http://help.yahoo.com/l/us/yahoo/mail/ymail/account/account-13.html

Hope that's helpful.

First Open a Web browser and navigate to the Yahoo! Mail sign-in page. Second Type the email address and password for the Yahoo! Mail account you want to reopen in the spaces provided and click the "Sign In" button to sign in to your account.
Third Click the "I can't access my account" link and follow the onscreen instructions to reactivate your Yahoo! Mail account. You will be asked for the identifying information you used to open the account the first time, such as your birth date and nationality. hope it can help you.

This will help on your signing problem

icantsignintoyahoomessenger.blogspot.com

when next time you sign in on yahoo mail check the box which is saying keep me signed in after that you no need to sign in every time to your yahoo mail

Thank you for using fixya


Regards
manish

i think u r account has been compramised

there iss not really a way to fix this if you want your email address to be @yahoo.com just sign up again and after 3-6 months of inactivity the other one will be available to use again for who ever.