SMTP Checker tool is a feature that allows users to check if their outgoing mail server, also known as Simple Mail Transfer Protocol (SMTP) server, is working properly. The tool is specifically designed for Gmail users who are experiencing issues with sending emails from their email clients, such as Microsoft Outlook, Apple Mail, or Mozilla Thunderbird.

To use the SMTP Checker tool, Gmail users must first navigate to the Gmail website and log in to their account. From there, they can access the tool by clicking on the “Settings” icon and selecting “See all settings” from the drop-down menu. Next, they can click on the “Accounts and Import” tab and scroll down to the “Send mail as” section, where they will find the “Send mail as” settings.

Once they have located the “Send mail as” settings, users can click on the “Edit info” link next to their email address to access the SMTP Checker tool. From there, they can enter the SMTP server address, port number, username, and password for their outgoing mail server. They can then click on the “Check connection” button to test if their SMTP server is working properly.

If the SMTP Checker tool returns an error message, users may need to troubleshoot their outgoing mail server settings or contact their email service provider for assistance. However, if the tool confirms that the SMTP server is working properly, users can proceed to send emails from their email client with confidence.