Emails won't send - connecting to SMTP server failed ...
answers.microsoft.com › en-us › outlook_comDec 18, 2018 · The message could not be sent because connecting to Outgoing server (SMTP) smtp-mail-outlook.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again. You referred to a source where the server is listed as "smtp-mail-outlook.com", but one of the links you provided lists the server as "smtp-mail.outlook.com", with a period between mail and outlook.