Hi ( Avoid unnecessary introductions :P ), in Odoo v8 I setup incomming and outgoing email.

When I leave Alias domain empty I can send emails.  When I put the Alias Domain it does not work.

General Settings >

• Manage multiple companies checked

• Alias Domain :  mydomain.com

Currently I have only 1 user administrator@mydomain.com and 1 company MyDomain. 

The error in the logs :

MailDeliveryException: (u'Mail Delivery Failed', u"Mail delivery failed via SMTP server 'smtp.office365.com'.\nSMTPDataError: 550\n5.7.60 SMTP; Client does not have permissions to send as this sender")

Any suggestions (asside of leaving Alias Domain empty)?

Other Aliases for the same owner are info, sales, jobs, _usertemplate (default ones) and administrator which is created from the user preferences page.