Hello Odooers! 

I managed to finally set up my inbound and outbound email servers (using outlook) and for testing purposes I used one email (test@mydomain.com) I was happy with that so I decided to delete the testing email, and create a proper odoo@mydomain.com email (since the notifications@ is already in use and we dont want to poke with that one)

I added the new email succesfully, but now whenever I create a new user I get this error from the GUI 

Invalid Operation

There was an error when trying to deliver your Email, please check your configuration

 After checking the console I noticed Odoo was trying to use a different email for this.

"Mail delivery failed via SMTP server 'None'.\nSMTPDataError: 554\n5.2.252 SendAsDenied; odoo@mydomain.com not allowed to send as notifications@mydomain.com

I've been looking everywhere and I cant find any place to change this, I cant even find where this is actually set up to try to use this one (since when i started testing I was using test@mydomain.com) 

Any guidance towards a solution is greatly appreciated!

(If needed this is currently hosted locally, we are currently testing a few things to check how Odoo handles everything before we start using it more widely)

Edit:

I noticed that in my company contact field I have the default from: notifications@mydomain.com but I am not able to change that! How can I change this???

Edit2:

I tried to update the value mail.default.from  by setting the email I want, but this still did not change the default value in the contact card nor allowed me to send emails to users.