We have integrated Let’s Encrypt into our control panel software product and are preparing for going live next week with you.
As we expect a large number of certificate requests, I’d like to know if there’s a certain rate limit (certificates per days per registration) or general certificates limit (certificates per registration).
Background: our ACME client creates just one registration (per server) and uses this for all authorizations and certificate requests. We’re talking about mass shared hosting and don’t see a reason why every end user should require an own ACME registration. Our software takes care to only request an authorization when the domain is actually reachable for verification, so we don’t expect errors here.