You can check the connection to the mail server by performing the connection check.
Enter the IP address of the printer in the browser and start Web Config.
Enter the printer's IP address from a computer that is connected to the same network as the printer.
Enter the administrator password to log in as an administrator.
Select in the following order.
Network tab > Email Server > Connection Test
Select Start.
The connection test to the mail server is started. After the test, the check report is displayed.
You can also check the connection to the mail server from the control panel. Access as below.
Settings > General Settings > Network Settings > Advanced > Email Server > Connection Check