Do you mean the firewall? I would think that's decided on a per-installation basis. Has someone told you they distribute a centralized list of sites to block?
just an fyi if your dkim and spf are not configured after a migration you will be blacklisted now apparently!!
You can submit a request for removal - I highly recommend cloudflare for dns although they do require you to transfer ur cname! But the extra protection is good and they allow a soft fail option in ur spf record submission!