DNS for Let's Encrypt

When I get the error

Error: DNS record for webmail.domain.com doesn't exist

while trying to set SSL on email, does that mean that let’s encrypt could not complete the dns lookup, or that Hestia doesn’t have a record of this local to the server?

it’s a local error and means that nslookup can’t resolve the hostname (webmail.domain.com)

Perfect - was able to troubleshoot and resolve thanks to this. Thanks!

(for posterity, I updated my system to point to and for name servers instead of my vps host)