The Outlook error would generally read as: "Outlook cannot connect to your outgoing SMTP server. " When you come across this error, you need to check the email account settings in the Outlook email client.If you are using the Microsoft Outlook version 2010 or later, perform the following steps to resolve the outgoing SMTP error.
If the above configuration didn't work, you could change the outgoing port numbers to see if the Outlook connects to the SMTP server.
Follow the above-mentioned directions to resolve the outlook cannot connect to outgoing SMTP server.