4 days ago my email account stopped working, sync error: 3219.

I have used the autosetup for @msn.com

I tried to remove my acount and add again, but I still got a sync error.

Now I tried IMAP as instructions tells on several internet pages. The sync of my inbox now works, but due to sending emails a sending message error occours:

>>

Meddelelsen kunne ikke sendes, fordi serveren afviste afsenderens e-mail-adresse. Afsenderens e-mail-adresse var: *** Email address is removed for privacy ***'.

Emne 'test 2016-08-17 9:40'
Serverfejl: 550
Svar fra server: 550 5.7.3 Requested action aborted; user not authenticated
Server: 'smtp-mail.outlook.com'
Windows Live Mail Fejl-id: 0x800CCC78
Protokol: SMTP
Port: 587
Sikker (SSL): Ja