this is cool! i've always struggled supporting custom domains. what dns wizardry does one need to do to support custom domains?
Two other things that have been nifty are:
I also use a couple fun technologies for custom domains:
- Entri [1] a new product that's like Plaid for domains. So, you can normally get the domain set up without copying records into the registrar.
- If you don't have a domain - I use Google Domains Express Checkout API [2], which lets you directly purchase a new domain and automatically connect it to Postcard, also without copying records into the registrar.