Is the account used automatically?

1

During the first run of letsencrypt-auto, an account was created with the email I specified in my ini file. Now that I see the account ID in /etc/letsencrypt/accounts, is it reasonable to include the ID in my ini file for future runs? What will letsencrypt do when I do not include the ID? Does it lookup the account automatically from /etc/letsencrypt or will it create a new account such that I have two accounts in the acounts/ directory afterwards?

An additional question: What happens when I want to use the same account ID together with another (yet unregistered) email address (e.g. when applying for a cert for another domain)?

2

I don’t think the “account” is currently really used.

3

I’m pretty sure the same account will be reused. Email addresses are always for accounts, not for domains. So if you want another email for anothe domain, you’d need another account.