They use the same IP and their domains are all listed here: https://verifymail.io/domain/carspure.com https://verifymail.io/domain/carspure.com I have to admit

They use the same IP and their domains are all listed here: https://verifymail.io/domain/carspure.com https://verifymail.io/domain/carspure.com I have to admit that they have improved though as earlier they were all using the same MX records, now at least each domain has its own.