Sending email authentification error [130]

Hello everyone,
so I setup Dolibarr and got everything the way I want it.
But now I tried to setup the email system, but i always get this error

Fehler beim Senden der E-Mail (Absender=mysenderemail <info@mysender.de>, Empfänger=mytestemail@outlook.de)
Error [120]: Ran into problems sending Mail. Response: 535 5.7.8 Error: authentication failed: UGFzc3dvcmQ6 Error [130]: Invalid Authentication Credentials.

I setup all the required fields for the SMTP sending and when I run the test and ping the server it works without any problems.
I am using localhost for Dolibarr and a webhosted server for our mails, set the port 587 and entered all the login data.

Any ideas?

Would you might including a picture of your email setup?

Also, which version of Dolibarr are you using?