Not OP, but using a similar setup: iCloud for government, banks, and a custom domain with Proton Mail for everything else. A few major banks here in my country have hardcoded domain names to include only Gmail, Outlook, Yahoo, iCloud, and a few local providers. The same is true for the Income Tax portal. Out of the given options, iCloud is relatively more private.
I’ve encountered a few other websites doing this kind of lazy implementation. Hide My Email by Apple works in such cases too, where I don’t want to disclose my primary iCloud address, which is accepted globally especially since it ends with @icloud.com.
Not OP, but using a similar setup: iCloud for government, banks, and a custom domain with Proton Mail for everything else. A few major banks here in my country have hardcoded domain names to include only Gmail, Outlook, Yahoo, iCloud, and a few local providers. The same is true for the Income Tax portal. Out of the given options, iCloud is relatively more private.
I’ve encountered a few other websites doing this kind of lazy implementation. Hide My Email by Apple works in such cases too, where I don’t want to disclose my primary iCloud address, which is accepted globally especially since it ends with @icloud.com.