Google give added security to their accounts by blocking less secure apps. This simply means Google will only let your account synchronize with apps and devices that are safe and secure. Google may block sign-in attempts from some apps or devices that do not use modern security standards. Since these apps and devices are easier to break into, blocking them helps keep your account safe.
When you try to use a less secure app or device, you might get a message asking you to change your Google account settings, or your email provider might say that your email or password is not match.
Allow Less Secure Apps To Access Your Gmail Account
The following steps will guide you to allow less secure apps to access your Gmail account. An app-specific password is a one-time use password that lets a less secure app go into your account. Because the app does not use your Google account password, it is not a security risk, and you can remove access to the app or device at any time you want.
Step 1 ====> Go to https://accounts.google.com. Log in to your Gmail account. You must provide your Gmail account detail; these include your user name and password.
Step 2 ====> Click Sign in & Security.
Step 3 ====> Under the Password & Sign in section, click App passwords. If asked, re-enter your password and click Sign in.
Step 4 ====> Click the Select app and select device drop downs for the app and device you are using. If your device or app is not listed, click Other (Customized name), and type the name of the app or device you are using.
Step 5 ====> Click Generate. A random password will be made, and steps on how to use it on your device might be given if they are available. This is the only time you can view this password, if you close the page do not use the password, you will have to make a new one.
Step 6 ====> Use this password on your app or device to log into your Google account.
Step 7 ====> When you are logged into your Google account on the app or device, click Done.
The app or device will be logged in using the app-specific password. Because each password can only be used on one device, you will need to make a password for each of the apps or devices that need one.