Create host default domain with Let's Encrypt certificate?
When this option is set to Yes, Virtualmin will automatically attempt to
create a hidden host default domain (virtual server) with a Let's Encrypt
certificate during the next configuration check. If the Let's Encrypt
certificate cannot be successfully requested for the system hostname,
the host default domain will be automatically removed.
However, it is possible to use Yes, and keep visible, option to keep
host default domain visible, and not have it removed in case Let's Encrypt
certificate cannot be requested successfully, which will allow for manual
adjustments later on.
If the system's hostname changes, Virtualmin will automatically try to
update host default domain name accordingly on the next configuration
check.
Host default domain can be disabled by setting this option to No,
which will make it to be removed from the system on the next configuration
check.
Be advised that using host default domain for mail is highly discouraged,
and may cause problems with mail delivery!