conrad82

I do the same!

I have a provider that is not supported by caddy, but I can still use it via duckdns delegation!

https://github.com/caddy-dns/duckdns?tab=readme-ov-file#challenge-delegation

Challenge delegation

To obtain a certificate using ACME DNS challenges, you’d use this module as described above. But, if you have a different domain (say, my.example.com) CNAME’d to your Duck DNS domain, you have two options:

1. Not use this module: Use a module matching the DNS provider for my.example.com.
2. Delegate the challenge to Duck DNS.

Not sure if it fits you, but personally I have set up a self hosted dovecot instance where i have moved old gmail emails to, using thunderbird as the client.