Email deliverability - Going to SPAM

Hello,

I have those both email blacklisted

137.74.41.82

213.32.69.50

I want to delisted them and also improve my delivery email to don't go to the spam.

A big range of IP from OVH hosting are listed on http://www.uceprotect.net/en/l3charts.php

Not only me but all OVH clients.

How can I do ? Is it possible de use another IP ? Like a relay or something ?

Thank you