My thought was a bash script that could be run from cron. It letsencrypt DNS TXT challenge and then upload it via curl to MOAB custom DNS.
So far all I got is
certbot certonly --agree-tos --manual --preferred-challenges dns -m firstname.lastname@example.org -d external.website
curl -X PUT -d “acme_code_from_letsencrypt” --user “user:pass” https://mail.in.a.box/admin/dns/custom/_acme-challenge.external.website/TXT
Certs can be copied to desired location in cron I suppose.
Any Help would be appreciated.