If you could make your own NetShield functionally equivalent to NextDNS or ControlD, then I would not require a custom DNS option either, because I could just use Proton. I just don't like the very limited and intransparent functionality of Proton's current integrated DNS option.

I would like to consolidate DNS (currently use Control-D and SmarterDNSProxy in different scenarios) into Proton (currently a Plus user but would upgrade to a single provider very happily)

Yes, it would be nice to have a DNS service similar to Decloudus. Their DNS server blocks all ads, trackers, and malware sites. They also offer a completely degoogled DNS server, and one that allows certain services like Youtube.

It's a paid service, and there's a throttled free version available for free users.

I would open a paid Proton subscription for the half degoogled one. I know there is a lot of value on Protonmail already, but it's not relevant to my interests. This would definitely add value.

I'd love to see a Proton Mail DNS service - something that is anonymous and secure.

I left a feedback about two weekd ago regarding a third party DNS resolution. At least the Android version of the app connects to dns11.quad9.net/443, presumably for DNS resolutions over HTTPS.
1. Why is it necessary? I blocked that connection through a device firewall and the PM app seems to still work.
2. This DNS server brings question of privacy. Especially, given there seems to be no alternative choices in the app setting.
3. Since I use black(/pi)-hole type of blocklists with my device and a local DNS cache in my home router with more extensive blacklists, DOH usage by PM is bypassing both, thus negative my privacy and security setups.
Expected: Use system DNS or add an setting to change DNS setting within the PM app.
Thank you.

A DNS Server with DNSSEC and DNS-over-TLS or HTTPS, with custom blacklists. Could be integrated as a Feature in ProtonVPN

Similar like to NextDNS or the Blockada App (local VPN).

Hi i would like to know which dns servers are secure to work with, please, or if you also provide any dns server please. Thanks in advance