What is the "Primary Domain" for ISP Accounts?

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What is the "Primary Domain" for ISP Accounts?

The Primary Domain that is used to sign up for a PBL Account must be clearly published in the IP-Whois, rWhois or rDNS (PTR) of all requested IP Master Ranges, as Spamhaus uses those network records to verify that the Primary Domain is authoritative for those ranges.

The Primary Domain must have a functional “abuse@yourprimarydomain” account that can be accessed and read by a human: “abuse@yourprimarydomain” is where we will send the confirmation code required to verify the application.

Domains with anonymized whois may not be eligible for PBL Accounts. The PBL Account Primary Domain should be chosen carefully so that we can identify the correct ranges for the account, and so that the PBL Account application can be successfully confirmed.

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