Can someone help me? VPS, Pleask, email and DNS.. I have a problem

Good evening,
I bought a VPS and a domain from OVH.
The domain and VPS configurations for the web side work.
Ex.: if I go to my domain from chrome I see the site correctly.

But I have a problem with the mail.
I noticed that on plesk I have a section dedicated to the mail, in this section I associated the mail administration@mydomain.com to the domain mydomain.com, I gave a password to the mail, I gave a quantity of space, and everything is fine, but when I try to access outlook it tells me that it doesn't work and when I go to the plesk button next to the email (Open webmail for this email address in a new browser window.) it tells me that I have problems with MX records.

So I went to enter mx0.mail.ovh.net. in the records of the OVH DNS panel of the domain purchased and now, when I go to the button next to the mail in plesk (Open webmail for this email address in a new browser window.) it returns me: https://www.ovh.com/fr/ mail/

Now when I insert the email and the password it tells me that the fields are wrong.
So I come to the question:
How can I create an email for my domain from my VPS with Plesk?