Can sign into yahoo mail on gmail

Unfortunately, it's not possible to sign into Yahoo Mail directly from Gmail. Here's why:

Different login systems: Yahoo Mail and Gmail use different login systems. Yahoo Mail uses a Yahoo account, while Gmail uses a Google account. These accounts are managed by different companies and have different authentication mechanisms.
Security concerns: If you were able to sign into Yahoo Mail from Gmail, it would create a security risk. Your Yahoo Mail account credentials would be exposed to the Gmail login system, which could potentially be compromised.
Technical limitations: Gmail and Yahoo Mail are built on different platforms and use different technologies. There isn't a straightforward way to integrate the two services to allow direct login.

However, there are some workarounds to access your Yahoo Mail account from Gmail:

Use a browser: You can open a new browser window or tab and navigate to the Yahoo Mail website (mail.yahoo.com). Sign in to your Yahoo Mail account using your Yahoo account credentials.
Use a third-party email client: You can use a third-party email client like Microsoft Outlook or Mozilla Thunderbird, which supports multiple email accounts, including Yahoo Mail. This way, you can access your Yahoo Mail account alongside your Gmail account.
Use a browser extension: There are browser extensions available that allow you to access multiple email accounts, including Yahoo Mail, from a single interface. For example, the "Multi Email Client" extension for Chrome or the "Email Client" extension for Firefox.

Remember to always prioritize security and use strong, unique passwords for each of your email accounts.