cs-india is the only public DNSCrypt server located in India that I can find. There’s dns.therifleman.name but it’s DoH. Still works with the DNSCrypt client though. Both have filters.
Have you tried specifying your preferences in the config file and letting DNSCrypt find the best server?
Cloudflare has a catch-all option that you can enable, but they only allow you to receive emails not send them. https://developers.cloudflare.com/email-routing/setup/email-routing-addresses/