Why does Google say I have suspicious activity?
If you've received a 'suspicious sign in prevented' email from Google, it means Google recently blocked an attempt to access your account because Google wasn't sure it was really you.
How do I stop Google from blocking my sign in?
To do so, sign into Gmail on your desktop, click your profile and select 'Settings'. On the settings page, go to Sign-in & security and scroll down to the very bottom where you will see the 'Allow less secure apps' option. Click the switch to enable/disable it.
Why is Google blocking my login?
You may be blocked from signing in to your Google Account if: The service you're signing in from doesn't provide enough information to prove it's you. You're signing in from a new location or device.
Does Google notify you if someone tries to log into your account?
Android users will be told of new device logins to their Google accounts via a notification on the smartphone rather than by email. ... Google notes that notifications will appear when a new device is used to login to an account, as well as when there is a security event linked to an account.