Make sure the outgoing/incoming mail servers, your username and password are correct.

If you continue to receive this message, contact your server administrator or internet service provider ( ISP).' Navigate to your email account settings in Outlook under: Tools > Account settings > highlight your account and click 'change' > click 'more settings' Look through all the tabs. When setting up Outlook, or after ISP network changes, it is a common annoyance to be unable to send/receive email with a message of this type: 'Outlook cannot connect to your outgoing ( SMTP) e-mail server.