It can be worrying to receive a Yahoo Mail alert about an unfamiliar sign-in, particularly when you know you haven't accessed your account from another device or location. Repeated verification requests, unexpected password-reset messages, unfamiliar login locations, or changes to your mail settings may indicate that someone is trying to access your account. However, an unfamiliar alert doesn't always mean your account has been compromised. A new device, VPN, browser, or network connection can also trigger Yahoo's security system.

Before troubleshooting the suspicious activity, it is recommended to backup Yahoo Mail using the BitRecover Yahoo Backup Tool. Keeping a local copy of your important emails gives you an additional layer of protection if you need to make major security changes or recover messages later. The tool can download Yahoo emails to your computer in multiple formats while preserving important email data, allowing you to keep an independent copy outside your Yahoo account.

Once your emails are backed up, start by reviewing your recent Yahoo account activity for unfamiliar devices, locations, or login times. If you notice something you don't recognize, change your Yahoo password immediately and create a strong, unique password that isn't used on any other website. You should also check your recovery phone number and recovery email address to ensure they haven't been changed without your knowledge.

Next, inspect your Yahoo Mail settings carefully. Look for unfamiliar automatic forwarding addresses, filters, reply-to addresses, signatures, or sending names, as unauthorized changes can sometimes be used to redirect or manipulate your emails. Also review the applications and services connected to your Yahoo account and remove access for anything you don't recognize or no longer use.

Finally, enable two-step verification to add another layer of protection to your account. Keep your browser, operating system, and Yahoo Mail app updated, and scan your devices for suspicious software if unusual activity continues. If Yahoo keeps reporting unfamiliar login attempts even after you've changed your password and secured the account, treat the alerts seriously and continue monitoring your account activity.