If youre running your own email services and wonder why outlook.com / hotmail.com are blocking you you can signup for this.
https://postmaster.live.com/snds
Its useful as quite often youll get blocked just for being in the same IP block as a spammy server. My experience to date is that once you notify them your IP isnt the culprit the block gets removed pretty quick.
Its useful as quite often youll get blocked just for being in the same IP block as a spammy server. My experience to date is that once you notify them your IP isnt the culprit the block gets removed pretty quick.