Gmail SMTP server is not working Google SMTP is a simple mail transport protocol that is a set of easy-to-use communication links used to send mail over the Internet. And Google SMTP which is used to send mail through their Google or Gmail account. But if the SMTP settings in your account are not working, and you are wondering why my Gmail SMTP server is not working , please refer to the details below. Steps to fix Google Account SMTP settings. Enable less secure apps in Gmail The biggest reason SMTP over the Internet does not work is that you may be using unprotected software in your mail that is not protected. Then log in to your Gmail account to fix the problem Click on the least secure apps: toggle them off Please wait while Google updates its settings Check your mail, SMTP will start working Two-factor verification method. If your account does not support SMTP, you can use a two-factor authentication method This method is more secure and provides secure access to your mail. ...