OVH email servers?

Trying to set up and use email with a Flask app that is hosted on a OVH vps.
Cant get the email sending working, have checked the docs and have set the outgoing mail port to 465(TLS) and using ssl0.ovh.net server. Username and password have been set.

No longer getting errors from within app when sending mail, but test mails are not showing up with the recipient :frowning: Am I using the right server?

Any help would be appreciated.