Confirmation emails fail


I have installed the phplist on a subdomain
when i test campaign it works well
when i try to register a user the system fail sending the confirmation email
if i am logged as admin and i try it it send a confirmation.
i use office365 email
the error message Client not authenticated to send mail.
yet if i am logged as admin it works.
anyone an idea what could it be please?

@laserpen It might be the same problem described in this earlier topic phpList 3.6.4 SMTP code: 550 - #6 by michiel

I will check it, thank you!

Simply by adding this to the config file it solved my issues


Thank you!!!