Changes

* www.example.com resolves to your SME Server--published DNS records give the external IP address of your SME Server when queried for www.example.com.

* www.example.com resolves to your SME Server--published DNS records give the external IP address of your SME Server when queried for www.example.com.

* Your SME Server is connected to the Internet, and is able to make outbound connections on ports 80 and 443.

* Your SME Server is connected to the Internet, and is able to make outbound connections on ports 80 and 443.

* Port 80 on your SME Server is open to the Internet (i.e., the Internet can reach your server on port 80)--you aren't behind a firewall, or some ISP filtering, that would block it.

* Port 80 on your SME Server is open to the Internet (i.e., the Internet can reach your server on port 80)--you aren't behind a firewall, or some ISP filtering, that would block it.  If you've made SSL mandatory for the Primary ibay, port 443 must also be open.

Letsencrypt will issue certificates that include multiple hostnames (for example, www.example.com, example.com, and mail.example.com), all of which would be part of the request.  All of the conditions above must be true for all of the hostnames you want to include in the certificate.

Letsencrypt will issue certificates that include multiple hostnames (for example, www.example.com, example.com, and mail.example.com), all of which would be part of the request.  All of the conditions above must be true for all of the hostnames you want to include in the certificate.