Community Forum
Do your Outlook SMTP settings match the ones on https://www.xfinity.com/support/articles/email-client-programs-with-xfinity-email?
If you are getting any Outlook error messages, please post the complete message minus any personal information. If the message contains an email address, remove the userID portion but leave the rest. For example, if the message contained the email address "bobsmith@example.net", edit that so it reads "********@example.net" before posting.