Using your own private domain does not give you the same level of anonymity. Your domain name becomes a globally unique identifier that companies (and once leak

Using your own private domain does not give you the same level of anonymity. Your domain name becomes a globally unique identifier that companies (and once leaked, anyone) can use to fingerprint you activity online. (Source, I run https://owlmail.io https://owlmail.io and this is a common question.)