EMAIL Pro - SRV and MX red not receiving emails

Hello,
Can somebody give me a clear explanation step by step how to set up my email pro please. The OVH guides are of no use and contain far too much unnecessary information.
My domain name was bought at OVH.
My website is wordpresss. and I bought the email pro service.
I entered the CNAME whatever on the Wordpress site.
And now I have 2 red stickers for SRV and MX. I seem to be able to send emails but do not receive them.
Were am I supposed to put all this information on the SRV/MX stickers? Subdomain/priority/weight/Port... I entered on OVH and Wordpress and nothing works.

Thanks in advance for your advice.