SMTP server refusing authentication

Hey, I'm having a problem with connecting to OVH SMTP server.
Friend of mine, gave me access to Email Pro account, and I tried to use it in my notification function which is using PHPMailer, instead of my Gmail account (which is working completly fine).

Im using details to that Email Pro account,
SMTP server **ssl0.ovh.net** port **465** is refusing connection, and port **587** is at least starting authentication, but then it fails with **SMTP ERROR: Password command failed: 535 5.7.1 Authentication failed**

Is there anything I'm missing here? That email account is working fine, but I cant connect to it with PHPMailer.. Does anyone know if OVH is blocking this? Maybe there is some kind of toggle to allow this? (In Gmail, i had to allow that kind of activity in account settings)