Not by default [1], but you can set it to what you prefer. But in my case my network is configured to always reach the in house DNS first, to keep latency low

Not by default [1], but you can set it to what you prefer. But in my case my network is configured to always reach the in house DNS first, to keep latency low [1] https://github.com/letsencrypt/boulder/blob/8167abd5e3c7a1427b1cfb459f50b18b44e45d5b/bdns/dns.go#L244 https://github.com/letsencrypt/boulder/blob/8167abd5e3c7a142...