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More number of websites make use of PHP in order to send email through SMTP. For instance, it is possible to create a custom mail form, or use a WordPress SMTP plugin. If a problem occurs in Google’s security settings, it may not allow you to send mails through SMTP servers. SMTP authentication erro Gmail can be resolved in a way given below.
Method 1: Enabling ‘Less Secure Apps’ within Gmail
- Step 1:Sign in to the Gmail account on your device.
- Step 2:Go to the Less Secure Apps page.
- Step 3:Enable the Allow less secure apps: ON feature.
- Step 4:Google will start updating this setting.
- Step 5:Check if the SMTP authentication error issue has been resolved by sending an email from your account.
For more solutions, you can contact our technical support team.
