I use Outlook 2010 with Outlook Connector, in which my two other Hotmail accounts have been sending and receiving properly and fine for the past year.
In Outlook: I tried to add a third Hotmail account today, but it only receives, and fails to send, any email. From this account, all emails remain stuck in the Outbox folder and generate this error message:
Task 'Sending - ...@outlook.com' reported error (0x8DE0006): The operation failed
I tried to Google this problem but there were overly too many results, none of which help.
Yet on hotmail.com: This 3rd email account functions completely normally.
User jjk_charles's comment: How do I "configure the problematic mail account alone" there?
User root's comment: How do I determine 'What Account Type is your Outlook profile?'
I use Outlook Connector, so didn't manually 'Outgoing mail server'. It functions normally for my other 2 Hotmails. 'Test Account Settings' reveals no errors.