FreeBSD/letsencrypt/certbot/2020-04-01について、ここに記述してください。

# sudo certbot certonly --standalone -d moin.qmail.jp
{{{
IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /usr/local/etc/letsencrypt/live/moin.qmail.jp-0002/fullchain.pem
   Your key file has been saved at:
   /usr/local/etc/letsencrypt/live/moin.qmail.jp-0002/privkey.pem
   Your cert will expire on 2020-06-30. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot
   again. To non-interactively renew *all* of your certificates, run
   "certbot renew"
 - If you like Certbot, please consider supporting our work by:
}}}