That’s not semantic versioning…

OP wants to store all of their porn collection in RAM

I don’t think you even need to configure the email.

If I recall correctly emails are optional for Let’s Encrypt but Caddy are partnered with ZeroSSL who do require emails so you’re encouraged to provide one.

More likely that they know of all the data they gather this is the most privacy defying, and impossible to anonymise so they’re fixing it before the EU forces them to.