Understanding Why Yahoo Mail Asks You to Log In Every Time

A Security Feature May Be to Blame

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Every time you log in to Yahoo Mail, you make sure Stay signed in is checked on the login screen, but the next time you open mail.yahoo.com, you are prompted to sign in again. Why doesn't your Yahoo Mail account remember your login credentials? 

Login Cookies Are Browser and Device Specific

By default, Stay signed in is selected on the Yahoo login page. It applies only to the browser you are using and the specific device you are using it on. If you attempt to log in on a different device or using a different browser, you have to log in again because your login information was saved on a cookie for a single browser and device.

If you are using the same device and same browser and you still have to log in, then something or someone deleted the Yahoo Mail cookie in your browser that would log you in automatically.

How to Keep the Yahoo Mail Login Cookie

There are several things you can do to prevent your computer from deleting your browser cookies, including the one for your Yahoo Mail login credentials:

  • When you log in to Yahoo Mail, confirm the box next to Stay signed in under your login credentials is checked.
  • Do not click Sign Out in the box that appears when you click your name at the top of any Yahoo page.
  • Do not clear your browser cookies manually.
  • Check your browser's setting to make sure it is not set to delete cookies when you shut it down.
  • Set browser extensions and anti-spyware software not to clear cookies or to exclude cookies from the yahoo.com domain.

About Private Browsing

For enhanced internet privacy, you can use your browser's private browsing feature to visit websites without storing cookies on your computer. That way you won't feel the need to delete them as often, but you'll have to sign in to Yahoo Mail each time you visit. If you use the private browsing features of your browser, it may explain why your login information isn't saved. Different browsers have different names for their private browsing programs. They include: