Common Outlook Outgoing Server (SMTP) Errors
www.slipstick.com › common-outlook-smtp-errorsFeb 13, 2018 · This means you are not using the correct outgoing (SMTP) server authentication settings. In Outlook 2007, go to Tools, Accounts Settings. In Outlook 2010 and 2013, go to File, Account Settings. Double click on the email account then click More Settings. Select Outgoing Server tab. Select Log on using and enter the username and password that can ...