Well first of all you need to enroll into  the snds program .
https://postmaster.live.com/snds/JMRP.aspx
And after you believe that all stuff on server are ok then you send a request to
https://support.microsoft.com/en-us/getsupport?oaspworkflow=start_1.0.0.0&wfname=capsub&productkey=edfsmsbl3&ccsid=635688189955348624&wa=wsignin1.0
