Sign in to Yahoo Mail

Go to mail.yahoo.com - if someone is already signed in to their account, click on "sign out" (top left corner) - then, click on the "SIGN IN" link below the search button.
You'll either way be on the login form: type your email address in the "Yahoo! ID" text field.
Tip: if your email address ends in "@yahoo.com", no need to type it since it matches the domain. If it ends in "@yahoo.co.uk" and you sign in through mail.yahoo.co.uk, type the username and skip the "@...", same for mail.yahoo.in (India) or mail.yahoo.ca (Canada).
Enter your case-sensitive password in the next text box.
Only check the "Keep me signed in" checkbox if you're using your own computer and/or trust people who have access to it when you leave it unlocked: with this option enabled, going to Yahoo Mail will automatically login to your inbox, bypassing the Sign-in form altogether.
Click on the "Sign in" button, and you are logged into your email account!
Tip: click "Sign Out" (top left) to completely logout and keep others out of your account.

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